The Yuan class also have AIP, which allows non-nuclear boats to stay underwater for days at a time.

元級也有AIP影音先锋最新网址，允許非核動力的潛艇在水下停留長達數(shù)天之久。

Thus, the sea engineering will appear the phenomenon that part is decay. It needs to carry on the partial antisepsis in the water.

這樣，海上工程就會出現(xiàn)局部被腐蝕的現(xiàn)象，需要在水下進行局部防腐欧美A级视频一区二区三区。

This discovery might help explain how all whales hear,researchers say.the work might also might also help scientists understand how animals are affected by underwater sonar the cuvier's beaked whales dive deep into the ocean in search of food.

研究人員稱，這項發(fā)現(xiàn)很可能有助于解釋所有鯨類的聽覺問題欧美亚洲日韩，這項研究還可能幫助科學家進一步理解動物怎樣在水下接收到聲納信號人人人爽人人做人人看视频。

In theory, a diesel-electric sub, when moving slowly underwater can be very difficult to detect.

理論上，柴電潛艇在水下慢速行駛時91天天在线精品国产，是極難被發(fā)現(xiàn)的国内在线手机自拍视频。

But for most divers it is a way of reaching jobs that must be done under water.

但對于大多數(shù)潛水員來說，這是在水下工作的一種方式中文字幕一级毛片在线看。

Though clumsy on land, Arctocephalus pusillus, or Cape fur seals, epitomize grace underwater.

南非海狗雖然在陸地上顯得笨拙一级做a爰片久久毛片A片app，但在水下卻成為優(yōu)雅的化身。

Though clumsy on land, Arctocephalus pusillus, or Cape fur seals, epitomize grace underwater.

雖然在陸地上顯得笨拙XXXx欧美老妇，Arctocephalus pusillus丁香五月婷婷五月丁香，或者叫毛皮海獅，在水下卻是優(yōu)美的縮影韩国三级HD中文字幕叫床。

In order to improve its effect,by simulating natural enviroment and irradiating the material of FRP under water with strong ultraviolet ray for a long time,the strength change in protection and nonprotection conditions is contrasted and the weather resistance is analyzed.

纖維增強復合材料在土木工程中越來越得到廣泛應用，為了更好地發(fā)揮其使用效果www.18黄，通過模擬自然環(huán)境禁视频国产一区二区，將其材料在水下經(jīng)長時間強紫外線照射，對比有保護和無保護情況下的強度變化wwwwwwwwww黄，進行耐候性分析研究日韩精品欧美狂野国产，結(jié)果表明有保護情況下強度保持率有了明顯提高在线观看美女网站瑟瑟。

Under water; e.g. at the bottom of a body of water .

在水下；例如在某個水體的底部精品女同一区二区三区免手续费站。

Of a Cape fur seal plunging through a forest of bull kelp fronds off the coast of Gansbaai, South Africa.

雖然在陸地上顯得笨拙韩国三级片网址，Arctocephalus pusillus，或者叫毛皮海獅18禁无遮挡啪啪无码网站免费看，在水下卻是優(yōu)美的縮影欧美在线视频在线播放a免费观看。