double-bottom trailer combination：雙聯(lián)拖車

double-bottom tank 雙重底液艙 | double-bottom trailer combination 雙聯(lián)拖車 | double-bottommargin plate 內(nèi)底邊板

double-branch bend：雙支彎頭

double-bowl vacuum centrifuge ==> 雙鼓真空離心過濾器 | double-branch bend ==> 雙支彎頭 | double-branch gate ==> 雙側(cè)澆口

double-branch gate：雙側(cè)澆口

double-branch bend ==> 雙支彎頭 | double-branch gate ==> 雙側(cè)澆口 | double-break circuit-breaker ==> 雙斷斷路器

double-break switch：雙斷開關(guān)

double bell 雙鈴 | double break switch 雙斷開關(guān) | double bridge 雙臂電橋

double-buttoned pyramid coat：角錐形雙鈕大衣

double-bus 雙層公共汽車 | double-buttoned pyramid coat 角錐形雙鈕大衣 | double-cable ropeway 雙纜索道

double-coated film：雙面藥膜底片

雙殼流量計 double-case meter | 雙面藥膜底片 double-coated film | 雙面X-射線底片 double-coated X-ray film

double-coated film：雙敷層膠片;雙面膠片

雙霧室 double cloud chamber | 雙敷層膠片;雙面膠片 double coated film | 雙重符合 double coincidence

double-coated film：雙涂層膠卷

雙座管燈 double-capped tubular lamp | 雙涂層膠卷 double-coated film | 雙錐形黏度計 double-cone viscometer

double-coated X-ray film：雙面X-射線底片

雙面藥膜底片 double-coated film | 雙面X-射線底片 double-coated X-ray film | 雙牙輪鉆頭 double-cone bit

lens; double-concave：雙凹透鏡

雙像透鏡 lens; double image | 雙凹透鏡 lens; double-concave | 雙凸透鏡 lens; double-convex