double perforation cine film：雙孔電影膠片

double pedestal desk 雙排抽屜寫(xiě)字臺(tái) | double perforation cine film 雙孔電影膠片 | double pick 雙嘴鎬

double color wheel：雙色輪

double coil nest spring 雙卷圓簧組 | double color wheel 雙色輪 | double phase 兩相

double expansion steam engine; compound engine：雙膨脹蒸汽機(jī)

兩端剪 double end shear | 雙膨脹蒸汽機(jī) double expansion steam engine; compound engine | 人字齒輪 double helical gear

double concave lens：雙凹透鏡

雙[光]束紫外線光譜儀 double-beam ultraviolet spectrophotometer | 雙凹透鏡 double-concave lens | 雙凸透鏡 double-convex lens

double concave lens：雙凹面透鏡 = 雙凹透鏡

double adiabatic approximation 雙緩漸近似= 浸漸絕熱近似 | double concave lens 雙凹面透鏡 = 雙凹透鏡 | double convex lens 雙凸面透鏡 = 雙凸透鏡

double continuous curve：正弦曲線

double contact key 雙觸鍵 | double continuous curve 正弦曲線 | double contraction 雙重收縮

double convex lens：雙凸透鏡

雙凹透鏡 double-concave lens | 雙凸透鏡 double-convex lens | 交直流發(fā)電機(jī) double-current generator

double convex lens：雙凸面透鏡 = 雙凸透鏡

double concave lens 雙凹面透鏡 = 雙凹透鏡 | double convex lens 雙凸面透鏡 = 雙凸透鏡 | double galaxy 雙重星系

double convex lens：雙凸透鏡進(jìn)出口貨物名稱(chēng)中英對(duì)照

double convex glass 雙凸玻璃 | double convex lens 雙凸透鏡進(jìn)出口貨物名稱(chēng)中英對(duì)照(101) | double convex ring 雙凸環(huán)

double-wall corrugated paper：雙壁瓦楞紙

double-voke snowsuit 雙V形肩軛式雪衫褲 | double-wall corrugated paper 雙壁瓦楞紙 | double-wall corrugated pipe 雙壁波紋管