double bond 双键

double border lace 双面边纹花边

double bottom tank 双层底油仓

double bracket 双支架

double brim calot of wool felt trimmed with feathers and with removable earlops 钉羽毛双箍活动耳遮瓜皮绒毡帽

double buff 双折布抛光轮

double buffing machine 复式抛光机

double bulb 双连球

double bulb-ended probe 双球头探针

double bunk bed 双层床

double button carbon microphone 双钮炭精盒传声器

double button microphone 双钮传声器

double button type microphone 双按扭式送话器

double cable winch 双索卷扬机

double cage type mechanical drum washer 双笼式机械洗桶机

double cage type motor 双鼠笼式电动机

double calipers 内外卡钳

double cantilever crane 双悬臂起重机

double cantilever gantry crane 双悬臂门式起重机

double capacitor 双联电容器

double carded yarn 双道梳棉纱

double carpet 双层地毯

double cashmere 开士米双层织物

double casing volute pump 双壳旋涡泵

double cassette radio recorder 双卡收录两用机

double cassette recorder 双卡录音机

double cassette stereo radio recorder 双卡立体声收录机

double cassette stereo recorder with detachable speaker system 双卡分离音箱立体声收录机

double cassinet 混纬缎

double cavity klystron amplifier 双腔式速调管放大器

double cavity klystron for oscillator 振荡器用双腔速调管

double cavity klystron 双腔速调管

double cell 双电池

double chest 双排抽屉柜

double chime bell 双音铃

double circuit breaker 双回路断路器

double circuit hoisting hook belt conveyor 双电路吊钩带输送器

double circuit receiver 双调谐电路接收机

double circular tooth gear 双圆弧齿轮

double circular-arc gear hob 双圆弧齿轮滚刀

double clad single-mode fiber 双包层单模光纤

double clam cooky 双蛤饼

double close end spanner 双头活动扳手

double close steel sash 双层密闭钢窗

double cloth 双层织物

double clutch 双离合器

double cocoon silk 双宫丝

double coil direction finder 双线圈测向器

double coil filament 双线圈灯丝

double coil lamp 双绕灯丝灯泡

double coil 双线圈

double coiled relay 双线圈继电器

double coiler card 双圈条梳棉机

double cold and hot heel-shaping machine 双冷热式后跟定型机

double cold reduction mill 再冷轧用轧机

double colour electro-engraving device 双色电刻机

double colour ice cream machine 双色冰淇淋机

double coloured plastic injection machine 双色注塑机

double coloured twist yarn 双色花线

double column guideway grinding machine 龙门导轨磨床

double column hydraulic straightening and mounting press 双柱校正压装液压机

double column inclinable press 双柱可倾压力机

double column jig boring machine 双柱坐标镗床

double column milling machine 双柱铣床

double column open-back inclinable power press 双柱开式可倾压力机

double column open-back press with fixed bed 双柱开式固定台压力机

double column planer 双柱刨床

double column planing machine 双柱龙门刨床

double column plano-grinding machine 双柱龙门刨磨床

double column plano-milling machine 双柱龙门刨铣床

double column pneumatic hammer 双柱气锤

double column rectifier for air separation 空气分离双柱精离塔

double column type digital height gauge with dial 带刻度盘双柱数字高度计

double column vertical boring and turning mill 双柱立式镗车床

double column vertical lathe 双柱立式车床

double combustion boiler 双炉膛锅炉

double commutator generator 双整流子发电机

double commutator motor generator 双整流子电动发动机

double commutator type machine 双整流子电机

double concave lens 双凹透镜

double conductor cord 双芯塞绳

double cone mixer 双锥混合器

double cone 对顶圆锥

double connecting bulb 双链球

double contact breaker 复式断电器

double contact controller 双触点调节器

double converter 双换流器

double convex glass 双凸玻璃

double convex lens 双凸透镜