词汇	expunge the class
释义	expunge the class 注销船级
随便看	underwater shaft underwater shaking table underwater shield tunnel underwater ship underwater ship hull underwater shock Underwater Shock Analysis underwater shock test underwater shockwave Underwater Shockwave Performance of Explosives underwater short-distance underwater sightseein boat underwater sightseeing boat underwater sightseeing-boat underwater sightseening boat underwater signal underwater signalling underwater signal processing underwater signal transmission underwater silt remover underwater simulation underwater skirt pile gripper underwater slope Underwater Society of America underwater soft roadbed