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CHAPTER IX
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ANTI-SUBMARINE TACTICS

In all warfare1, new weapons of attack are, sooner or later, met by new methods of defence. The submarine and the aeroplane are at present the only weapons against which there is no true means of defence, and yet one is being used as an antidote2 for the other without, however, any very striking success so far. The seaplane may be able to distinguish the dark patch in the sea caused by the hull3 of the submarine in clear water, but she cannot destroy it, neither can she signal the exact locality to an accompanying destroyer flotilla, owing to the speed with which seaplane and submarine pass over and under each other; furthermore, in rough weather or 147in shallow muddy water no sign of the submarine when submerged is visible from above. The great value of the seaplane as an antidote for submarines lies, however, first in the fact that the water of the open sea is usually clear, and the submarine shadow is visible from above, and, secondly4, in the great speed of these aircraft which enables them to quickly cover miles of sea in their search for hostile submarines and to report their presence in a given locality by wireless5 to all ships operating within range.

When the enormous superficial area of a zone of war, such as the North Sea and English Channel, is duly considered, however, the difficulty in quickly and reliably locating from the air the few scattered6 “submarine shadows” will be easily realized. To make this method of locating submarines even fairly reliable an enormous fleet of seaplanes would be required. Again seaplanes do not, in themselves, constitute 148a means of defence against submarine attack, they merely increase the likelihood of detection, but, in actual warfare, it has now been proved that for every submarine detected by seaplanes two others pass quite unobserved.

Many means of attack on submarines have been proposed; and no doubt some of these, in certain cases, would prove effective; but none can be relied upon. Therefore, one of the points in favour of the submarine still remains8 without its antidote. This is the moral effect; for if there is no absolutely reliable means of defence, there can be no feeling of security for surface warships10 or merchant vessels11 when anywhere within the danger zone of the submarine.

Let us now examine briefly13 what practical methods of defence a modern warship9 has against submarine attacks. Great speed is undoubtedly14 a surface ship’s most reliable defence; and when combined with a frequent change of course, would greatly reduce the chances 149of a successful under-water attack. Should hostile submarines be on the line of advance they would not know whether to wait and chance the enemy approaching within torpedo15 range or whether to run to starboard or port. This is, if the surface warship was steaming in an erratic16 course—not a zigzag17 course, for then it might be possible to estimate, within torpedo range, the position of the ship at a given point if the “tacks” were regular.

Should submarines be seen approaching, a surface vessel12 would do well to turn her stern to the attacking flotilla, presenting as small a target as possible, and deflecting18 the torpedoes19 by her propeller20 race.

The escape of the Battle Cruiser Queen Mary and the Light Cruiser Lowestoft, during the action in the Heligoland Bight, as described in the dispatch of Vice-Admiral Sir David Beatty, K.C.B., demonstrates what may be done by the skilful21 use of the helm 150on surface warships to frustrate22 submarine attacks. So interesting, and informative23 as to the actual fighting between British warships and hostile submarines, in this dispatch that I give it here in full. It should, however, be studied in conjunction with the comprehensive report—the first in the history of Naval24 warfare detailing submarine attack and reconnaissance—from Commodore Roger J. B. Keyes, C.B., of the British submarines, given on page 28.
“H.M.S. Lion,   
1st September, 1914.

“Sir,—I have the honour to report that on Thursday, 27th August, at 5 a.m., I proceeded with the First Battle Cruiser Squadron and First Light Cruiser Squadron in company, to rendezvous25 with the Rear-Admiral, Invincible26.

“At 4 a.m., 28th August, the movements of the Flotillas commenced as previously27 arranged, the Battle Cruiser Squadron and Light Cruiser Squadron 151supporting. The Rear-Admiral, Invincible, with New Zealand and four Destroyers having joined my flag, the Squadron passed through the pre-arranged rendezvous.

“At 8.10 a.m. I received a signal from the Commodore (T), informing me that the Flotilla was in action with the enemy. This was presumably in the vicinity of their pre-arranged rendezvous. From this time until 11 a.m. I remained about the vicinity ready to support as necessary, intercepting28 various signals, which contained no information on which I could act.

“At 11 a.m. the Squadron was attacked by three Submarines. The attack was frustrated29 by rapid man?uvring and the four Destroyers were ordered to attack them. Shortly after 11 a.m., various signals having been received indicating that the Commodore (T) and Commodore (S) were both in need of assistance, I ordered the Light Cruiser Squadron to support the Torpedo Flotillas.

152“Later I received a signal from the Commodore (T), stating that he was being attacked by a large Cruiser, and a further signal informing me that he was being hard pressed and asking for assistance. The Captain (D), First Flotilla, also signalled that he was in need of help.

“From the foregoing the situation appeared to me critical. The Flotillas had advanced only ten miles since 8 a.m., and were only about twenty-five miles from two enemy bases on their flank and rear respectively. Commodore Goodenough had detached two of his Light Cruisers to assist some Destroyers earlier in the day, and these had not yet rejoined. (They rejoined at 2.30 p.m.). As the reports indicated the presence of many enemy ships—one a large Cruiser—I considered that his force might not be strong enough to deal with the situation sufficiently30 rapidly, so at 11.30 a.m. the Battle Cruisers turned to E.S.E., and worked up to full speed. It was evident 153that to be of any value the support must be overwhelming and carried out at the highest speed possible.

“I had not lost sight of the risk of Submarines, and possible sortie in force from the enemy’s base, especially in view of the mist to the South-East.

“Our high speed, however, made submarine attack difficult, and the smoothness of the sea made their detection comparatively easy. I considered that we were powerful enough to deal with any sortie except by a Battle Squadron, which was unlikely to come out in time, provided our stroke was sufficiently rapid.

“At 12.15 p.m. Fearless and First Flotilla were sighted retiring West. At the same time the Light Cruiser Squadron was observed to be engaging an enemy ship ahead. They appeared to have her beat.

“I then steered31 N.E. to sounds of firing ahead, and at 12.30 p.m. sighted Arethusa and Third Flotilla retiring to 154the Westward32 engaging a Cruiser of the Kolberg class on our Port Bow. I steered to cut her off from Heligoland, and at 12.37 p.m. opened fire. At 12.42 the enemy turned to N.E., and we chased at 27 knots.

“At 12.56 p.m. sighted and engaged a two-funnelled Cruiser ahead. Lion fired two salvoes at her, which took effect, and she disappeared into the mist, burning furiously and in a sinking condition. In view of the mist and that she was steering33 at high speed at right angles to Lion, who was herself steaming at 28 knots, the Lion’s firing was very creditable.

“Our Destroyers had reported the presence of floating mines to the Eastward34 and I considered it inadvisable to pursue her. It was also essential that the Squadrons should remain concentrated, and I accordingly ordered a withdrawal35. The Battle Cruisers turned North and circled to port to complete the destruction of the vessel first engaged. 155She was sighted again at 1.25 p.m. steaming S.E. with colours still flying. Lion opened fire with two turrets36, and at 1.35 p.m., after receiving two salvoes, she sank.

“The four attached Destroyers were sent to pick up survivors37, but I deeply regret that they subsequently reported that they searched the area but found none.

“At 1.40 p.m. the Battle Cruisers turned to the Northward38, and Queen Mary was again attacked by a Submarine. The attack was avoided by the use of the helm. Lowestoft was also unsuccessfully attacked. The Battle Cruisers covered the retirement39 until nightfall. By 6 p.m., the retirement having been well executed and all Destroyers accounted for, I altered course, spread the Light Cruisers, and swept northwards in accordance with the Commander-in-Chief’s orders. At 7.45 p.m. I detached Liverpool to Rosyth with German prisoners, seven officers and 79 men, 156survivors from Mainz. No further incident occurred.—I have the honour to be, Sir, your obedient Servant.
“(Signed) DAVID BEATTY,   
“Vice-Admiral.
“The Secretary of the Admiralty.”   

Quick-firing guns of the 3-inch and 6-inch type are certainly the best weapons for an attack on submarines. In combination with “sharp look-outs,” they could be used with effect from the elevated positions on the fore7 part of warships. The periscopic-tube of the submarine always proves a target for gun-fire; but a grey steel tube, 3 inches in diameter, at a distance of 1,000 yards requires “excellent” marksmanship to hit. That it can be done is proved by the sinking of the German submarine U.15 by the British Cruiser Birmingham in the North Sea. The effect of a shot carrying away the periscope40 is to blind the submarine, at least in one eye, she can then be run-down by the surface 157warship or destroyed by rapid gun-fire at close range.

Of course, if submarines were caught napping on the surface the guns of surface warships could quickly sink them; but another incident, similar to that which opened the naval engagements of the Russo-Japanese War, cannot be looked for in the naval engagements to come.

For a fleet engaged in bombarding or blockading, one of the best methods of defence would be to lower the torpedo nets, not close round each vessel, but suspended from “picket-boats” at a distance from the bombarding or blockading fleet. “Picketing” is also considered a good defence during daylight, but neither of these methods are reliable. A submarine might be able to dive unobserved under, or past, the destroyers acting41 as pickets42, and it is this chance which causes these under-water craft to be a source of constant anxiety.

The torpedo-boat destroyer should prove a nasty enemy to the submarine. 158In warfare it is the duty of these 30-knot vessels to look after their under-water opponents.

It has been suggested that internal armour43 could be fitted to warships below the water-line, which would render the hulls44 able to withstand mine or torpedo explosions. At present this is practically impossible, as the great weight of this additional armour, combined with the ever-increasing size of guns and weight of above-water protection, would necessitate45 a vessel of such enormous displacement46 as to be quite impossible, if the important factor—high speed—has also to be maintained.

The defence of harbours against submarines is a problem which does not present nearly so many difficulties as the defence of moving ships. Portsmouth, for example, is closed by means of a submarine boom-defence, which is stretched across the mouth of the harbour. The entrance to the River Elbe (leading to the Kaiser Wilhelm 159Canal) is effectively closed to British submarines by boom-defences, mines, and submerged wire entanglements47. Narrow waterways, such as the Straits of Dover, can be closed by the laying of contact-mines, and even broader seas can be made dangerous to submarines by the same method. An example of this is afforded by the laying of a British mine-field somewhere between the Goodwin Sands and the Dutch Coast, to prevent German submarines from penetrating48 into the English Channel.

There are so many reliable means of defending harbours and narrow waterways against submarines that it is unnecessary to say anything further here. But to protect moving ships at sea, under all conditions, certainly presents a most profound puzzle.

点击收听单词发音收听单词发音  

1 warfare XhVwZ     
n.战争(状态);斗争;冲突
参考例句:
  • He addressed the audience on the subject of atomic warfare.他向听众演讲有关原子战争的问题。
  • Their struggle consists mainly in peasant guerrilla warfare.他们的斗争主要是农民游击战。
2 antidote 4MZyg     
n.解毒药,解毒剂
参考例句:
  • There is no known antidote for this poison.这种毒药没有解药。
  • Chinese physicians used it as an antidote for snake poison.中医师用它来解蛇毒。
3 hull 8c8xO     
n.船身;(果、实等的)外壳;vt.去(谷物等)壳
参考例句:
  • The outer surface of ship's hull is very hard.船体的外表面非常坚硬。
  • The boat's hull has been staved in by the tremendous seas.小船壳让巨浪打穿了。
4 secondly cjazXx     
adv.第二,其次
参考例句:
  • Secondly,use your own head and present your point of view.第二,动脑筋提出自己的见解。
  • Secondly it is necessary to define the applied load.其次,需要确定所作用的载荷。
5 wireless Rfwww     
adj.无线的;n.无线电
参考例句:
  • There are a lot of wireless links in a radio.收音机里有许多无线电线路。
  • Wireless messages tell us that the ship was sinking.无线电报告知我们那艘船正在下沉。
6 scattered 7jgzKF     
adj.分散的,稀疏的;散步的;疏疏落落的
参考例句:
  • Gathering up his scattered papers,he pushed them into his case.他把散乱的文件收拾起来,塞进文件夹里。
7 fore ri8xw     
adv.在前面;adj.先前的;在前部的;n.前部
参考例句:
  • Your seat is in the fore part of the aircraft.你的座位在飞机的前部。
  • I have the gift of fore knowledge.我能够未卜先知。
8 remains 1kMzTy     
n.剩余物,残留物;遗体,遗迹
参考例句:
  • He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
  • The remains of the meal were fed to the dog.残羹剩饭喂狗了。
9 warship OMtzl     
n.军舰,战舰
参考例句:
  • He is serving on a warship in the Pacific.他在太平洋海域的一艘军舰上服役。
  • The warship was making towards the pier.军舰正驶向码头。
10 warships 9d82ffe40b694c1e8a0fdc6d39c11ad8     
军舰,战舰( warship的名词复数 ); 舰只
参考例句:
  • The enemy warships were disengaged from the battle after suffering heavy casualties. 在遭受惨重伤亡后,敌舰退出了海战。
  • The government fitted out warships and sailors for them. 政府给他们配备了战舰和水手。
11 vessels fc9307c2593b522954eadb3ee6c57480     
n.血管( vessel的名词复数 );船;容器;(具有特殊品质或接受特殊品质的)人
参考例句:
  • The river is navigable by vessels of up to 90 tons. 90 吨以下的船只可以从这条河通过。 来自《简明英汉词典》
  • All modern vessels of any size are fitted with radar installations. 所有现代化船只都有雷达装置。 来自《现代汉英综合大词典》
12 vessel 4L1zi     
n.船舶;容器,器皿;管,导管,血管
参考例句:
  • The vessel is fully loaded with cargo for Shanghai.这艘船满载货物驶往上海。
  • You should put the water into a vessel.你应该把水装入容器中。
13 briefly 9Styo     
adv.简单地,简短地
参考例句:
  • I want to touch briefly on another aspect of the problem.我想简单地谈一下这个问题的另一方面。
  • He was kidnapped and briefly detained by a terrorist group.他被一个恐怖组织绑架并短暂拘禁。
14 undoubtedly Mfjz6l     
adv.确实地,无疑地
参考例句:
  • It is undoubtedly she who has said that.这话明明是她说的。
  • He is undoubtedly the pride of China.毫无疑问他是中国的骄傲。
15 torpedo RJNzd     
n.水雷,地雷;v.用鱼雷破坏
参考例句:
  • His ship was blown up by a torpedo.他的船被一枚鱼雷炸毁了。
  • Torpedo boats played an important role during World War Two.鱼雷艇在第二次世界大战中发挥了重要作用。
16 erratic ainzj     
adj.古怪的,反复无常的,不稳定的
参考例句:
  • The old man had always been cranky and erratic.那老头儿性情古怪,反复无常。
  • The erratic fluctuation of market prices is in consequence of unstable economy.经济波动致使市场物价忽起忽落。
17 zigzag Hf6wW     
n.曲折,之字形;adj.曲折的,锯齿形的;adv.曲折地,成锯齿形地;vt.使曲折;vi.曲折前行
参考例句:
  • The lightning made a zigzag in the sky.闪电在天空划出一道Z字形。
  • The path runs zigzag up the hill.小径向山顶蜿蜒盘旋。
18 deflecting 53909b980ea168975caea537d27c6cb4     
(使)偏斜, (使)偏离, (使)转向( deflect的现在分词 )
参考例句:
  • A variety of mechanical surfaces have been employed for deflecting the exhaust jets of solid-propellant rockets. 人们已经用过各种类型的机械控制面来偏转固体推进剂火箭的排气流。
  • If she made a leading statement, he was expert deflecting her into more impersonal channels. 只要她一开口,他就会巧妙地把她的话题转到与个人无关的问题上去。
19 torpedoes d60fb0dc954f93af9c7c38251d008ecf     
鱼雷( torpedo的名词复数 ); 油井爆破筒; 刺客; 掼炮
参考例句:
  • We top off, take on provisions and torpedoes, and go. 我们维修完,装上给养和鱼雷就出发。
  • The torpedoes hit amidship, and there followed a series of crashing explosions. 鱼雷击中了船腹,引起了一阵隆隆的爆炸声。
20 propeller tRVxe     
n.螺旋桨,推进器
参考例句:
  • The propeller started to spin around.螺旋桨开始飞快地旋转起来。
  • A rope jammed the boat's propeller.一根绳子卡住了船的螺旋桨。
21 skilful 8i2zDY     
(=skillful)adj.灵巧的,熟练的
参考例句:
  • The more you practise,the more skilful you'll become.练习的次数越多,熟练的程度越高。
  • He's not very skilful with his chopsticks.他用筷子不大熟练。
22 frustrate yh9xj     
v.使失望;使沮丧;使厌烦
参考例句:
  • But this didn't frustrate Einstein.He was content to go as far as he could.但这并没有使爱因斯坦灰心,他对能够更深入地研究而感到满意。
  • They made their preparations to frustrate the conspiracy.他们作好准备挫败这个阴谋。
23 informative 6QczZ     
adj.提供资料的,增进知识的
参考例句:
  • The adverts are not very informative.这些广告并没有包含太多有用信息。
  • This intriguing book is both thoughtful and informative.这本引人入胜的书既有思想性又富知识性。
24 naval h1lyU     
adj.海军的,军舰的,船的
参考例句:
  • He took part in a great naval battle.他参加了一次大海战。
  • The harbour is an important naval base.该港是一个重要的海军基地。
25 rendezvous XBfzj     
n.约会,约会地点,汇合点;vi.汇合,集合;vt.使汇合,使在汇合地点相遇
参考例句:
  • She made the rendezvous with only minutes to spare.她还差几分钟时才来赴约。
  • I have a rendezvous with Peter at a restaurant on the harbour.我和彼得在海港的一个餐馆有个约会。
26 invincible 9xMyc     
adj.不可征服的,难以制服的
参考例句:
  • This football team was once reputed to be invincible.这支足球队曾被誉为无敌的劲旅。
  • The workers are invincible as long as they hold together.只要工人团结一致,他们就是不可战胜的。
27 previously bkzzzC     
adv.以前,先前(地)
参考例句:
  • The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • Let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
28 intercepting 610ea325c8da487d3cb8c3e52877af6a     
截取(技术),截接
参考例句:
  • The police had been intercepting my mail, ie reading it before it was delivered. 警方一直截查我的邮件。
  • We've been intercepting radio transmissions from Moscow. 我们已从莫斯科拦截到无线电信号。
29 frustrated ksWz5t     
adj.挫败的,失意的,泄气的v.使不成功( frustrate的过去式和过去分词 );挫败;使受挫折;令人沮丧
参考例句:
  • It's very easy to get frustrated in this job. 这个工作很容易令人懊恼。
  • The bad weather frustrated all our hopes of going out. 恶劣的天气破坏了我们出行的愿望。 来自《简明英汉词典》
30 sufficiently 0htzMB     
adv.足够地,充分地
参考例句:
  • It turned out he had not insured the house sufficiently.原来他没有给房屋投足保险。
  • The new policy was sufficiently elastic to accommodate both views.新政策充分灵活地适用两种观点。
31 steered dee52ce2903883456c9b7a7f258660e5     
v.驾驶( steer的过去式和过去分词 );操纵;控制;引导
参考例句:
  • He steered the boat into the harbour. 他把船开进港。
  • The freighter steered out of Santiago Bay that evening. 那天晚上货轮驶出了圣地亚哥湾。 来自《简明英汉词典》
32 westward XIvyz     
n.西方,西部;adj.西方的,向西的;adv.向西
参考例句:
  • We live on the westward slope of the hill.我们住在这座山的西山坡。
  • Explore westward or wherever.向西或到什么别的地方去勘探。
33 steering 3hRzbi     
n.操舵装置
参考例句:
  • He beat his hands on the steering wheel in frustration. 他沮丧地用手打了几下方向盘。
  • Steering according to the wind, he also framed his words more amicably. 他真会看风使舵,口吻也马上变得温和了。
34 eastward CrjxP     
adv.向东;adj.向东的;n.东方,东部
参考例句:
  • The river here tends eastward.这条河从这里向东流。
  • The crowd is heading eastward,believing that they can find gold there.人群正在向东移去,他们认为在那里可以找到黄金。
35 withdrawal Cfhwq     
n.取回,提款;撤退,撤军;收回,撤销
参考例句:
  • The police were forced to make a tactical withdrawal.警方被迫进行战术撤退。
  • They insisted upon a withdrawal of the statement and a public apology.他们坚持要收回那些话并公开道歉。
36 turrets 62429b8037b86b445f45d2a4b5ed714f     
(六角)转台( turret的名词复数 ); (战舰和坦克等上的)转动炮塔; (摄影机等上的)镜头转台; (旧时攻城用的)塔车
参考例句:
  • The Northampton's three turrets thundered out white smoke and pale fire. “诺思安普敦号”三座炮塔轰隆隆地冒出白烟和淡淡的火光。
  • If I can get to the gun turrets, I'll have a chance. 如果我能走到炮塔那里,我就会赢得脱险的机会。
37 survivors 02ddbdca4c6dba0b46d9d823ed2b4b62     
幸存者,残存者,生还者( survivor的名词复数 )
参考例句:
  • The survivors were adrift in a lifeboat for six days. 幸存者在救生艇上漂流了六天。
  • survivors clinging to a raft 紧紧抓住救生筏的幸存者
38 northward YHexe     
adv.向北;n.北方的地区
参考例句:
  • He pointed his boat northward.他将船驶向北方。
  • I would have a chance to head northward quickly.我就很快有机会去北方了。
39 retirement TWoxH     
n.退休,退职
参考例句:
  • She wanted to enjoy her retirement without being beset by financial worries.她想享受退休生活而不必为金钱担忧。
  • I have to put everything away for my retirement.我必须把一切都积蓄起来以便退休后用。
40 periscope IMhx2     
n. 潜望镜
参考例句:
  • The captain aligned the periscope on the bearing.船长使潜望镜对准方位。
  • Now,peering through the periscope he remarked in businesslike tones.现在,他一面从潜望镜里观察,一面用精干踏实的口吻说话。
41 acting czRzoc     
n.演戏,行为,假装;adj.代理的,临时的,演出用的
参考例句:
  • Ignore her,she's just acting.别理她,她只是假装的。
  • During the seventies,her acting career was in eclipse.在七十年代,她的表演生涯黯然失色。
42 pickets 32ab2103250bc1699d0740a77a5a155b     
罢工纠察员( picket的名词复数 )
参考例句:
  • Five pickets were arrested by police. 五名纠察队员被警方逮捕。
  • We could hear the chanting of the pickets. 我们可以听到罢工纠察员有节奏的喊叫声。
43 armour gySzuh     
(=armor)n.盔甲;装甲部队
参考例句:
  • His body was encased in shining armour.他全身披着明晃晃的甲胄。
  • Bulletproof cars sheathed in armour.防弹车护有装甲。
44 hulls f3061f8d41af9c611111214a4e5b6d16     
船体( hull的名词复数 ); 船身; 外壳; 豆荚
参考例句:
  • Hulls may be removed by aspiration on screens. 脱下的种皮,可由筛子上的气吸装置吸除。
  • When their object is attained they fall off like empty hulls from the kernel. 当他们的目的达到以后,他们便凋谢零落,就象脱却果实的空壳一样。
45 necessitate 5Gkxn     
v.使成为必要,需要
参考例句:
  • Your proposal would necessitate changing our plans.你的提议可能使我们的计划必须变更。
  • The conversion will necessitate the complete rebuilding of the interior.转变就必需完善内部重建。
46 displacement T98yU     
n.移置,取代,位移,排水量
参考例句:
  • They said that time is the feeling of spatial displacement.他们说时间是空间位移的感觉。
  • The displacement of all my energy into caring for the baby.我所有精力都放在了照顾宝宝上。
47 entanglements 21766fe1dcd23a79e3102db9ce1c5dfb     
n.瓜葛( entanglement的名词复数 );牵连;纠缠;缠住
参考例句:
  • Mr. White threaded his way through the legal entanglements. 怀特先生成功地解决了这些法律纠纷。 来自《简明英汉词典》
  • At dawn we broke through the barbed wire entanglements under the city wall. 拂晓我们突破了城墙的铁丝网。 来自《简明英汉词典》
48 penetrating ImTzZS     
adj.(声音)响亮的,尖锐的adj.(气味)刺激的adj.(思想)敏锐的,有洞察力的
参考例句:
  • He had an extraordinarily penetrating gaze. 他的目光有股异乎寻常的洞察力。
  • He examined the man with a penetrating gaze. 他以锐利的目光仔细观察了那个人。


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