double cylinder diaphragm pump 双缸隔膜泵

double cylinder engine 双汽缸发动机

double cylinder jacquard machine 双针筒提花针织机

double cylinder jacquard 双滚筒提花机

double cylinder machine 双针筒针织机

double cylinder mortise dead lock 铁皮铁闸弹子门锁

double cylinder press 双滚筒印刷机

double cylinder rim drawback lock 双舌弹子门锁

double cylinder slip pump 双缸泥浆泵

double cylinder vertical solution filter 双筒立式溶液过滤机

double damask 八枚花缎

double decker bed 双层床

double decker box bag 双格提包

double decker 两层公共汽车

double decomposition grease 复合解润滑脂

double diode laser 双二极管激光器

double diode limiter 双二极管限幅器

double diode rectifier 双二极管整流器

double diode 双二极管

double diode-pentode 双二极-五极管

double diode-triode 双二极-三极管

double disc drill colter 双圆盘条播开沟器

double disc friction screw press 双圆盘摩擦压力机

double disc gate valve 双圆板闸阀

double disc magnetic disk machine 双片磁盘机

double disc slide valve 双动滑阀

double disk friction press 双盘摩擦压力机

double disk friction screw press 双盘摩擦压力机

double disk harrow 双圆盘耙路机

double disk lapping machine for indexable carbide insert 可转位插刀双端面研磨机

double disk lapping machine 双盘研磨机

double disk surface grinding machine 双盘面磨床

double dope transistor 双掺杂晶体管

double doughnut laser 双圈激光器

double draft bull block 二次拉丝机

double drawn black goathair 双齐黑山羊把毛

double drawn cow tail hair 双齐牛尾毛

double drawn goathair 双齐山羊把毛

double drawn hair 双齐档发

double drawn horse mane 双齐马鬃

double drawn horse tail hair 双齐马尾毛

double drawn human hair 双齐档发

double drawn mixed goathair 双齐花山羊把毛

double drawn white goathair 双齐白山羊把毛

double drawn yak tail hair 双齐牦牛尾毛

double drawn yakhorse tail hair 双齐牦牛马尾毛

double dresser and mirror 双排斗配镜梳妆台

double dresser with 6 drawers 双排六斗梳妆台

double drill 双钻

double drum dryer with dip-feed 浸没加料式双滚筒干燥器

double drum dryer with top-feed 顶部加料式双滚筒干燥器

double drum mixer 双滚筒搅拌机

double duo mill 双二辊式轧机

double effect evaporator 双效应蒸发器

double eight-high rolling mill 双八辊轧机

double end 15 degree angle wrench 双头15度斜口扳手

double end adjustable spanner 双头可调扳手

double end adjustable wrench 双头可调扳手

double end bolt 双头螺栓

double end tool post wrench 双头刀架扳手

double epitaxial IC transistor 双外延集成电路晶体管

double equal-angle cutter 对称双角铣刀

double expansion engine 双级膨胀蒸汽机

double extension motor 双凸轴电动机

double eye piston rod 双眼活塞杆

double face hammer 双面锤

double face horizontal fine boring machine 双面卧式精镗床

double face lady's dress 双面女衣呢

double face mill 双面铣刀

double face planer 双面刨床

double face ribbon 双面缎带

double face valve 双面阀

double faucet shampoo spray 双笼头洗头喷水器

double fault indicator relay 复式故障指示继电器

double feed automatic hosiery machine 双成圈自动织袜机

double feed machine 双系统针织机

double filling  duck 双纬帆布

double filter 双联滤器

double fired boiler 双燃烧管锅炉

Double Fish shortcake 双鱼酥

double flame furnace 返焰炉

double flexible coupling 双挠性联轴节

double fluid cell 双液电池

double fluid ink 双液型油墨

double flush socket 双暗插

double focusing mass spectrometer 双聚焦质谱仪

double french horn 圆号

double frit glaze 双熔块釉

double genoa 棱条棉绒布

double glass silk wrapped copper wire 双玻璃丝包铜丝

double gloves 双层手套

double godet machine 双导丝盘纺丝机

double godet roller spinning machine 双导辊纺丝机

double goniometer 双向测角计

double governor 双重调节器

double grating monochromator 双光栅单色仪