double-hook oil ring：雙刃刮油環(huán)

double-helical gearbox 人字齒輪減速器 | double-hook oil ring 雙刃刮油環(huán) | double-hulled ship 雙殼體船

double column open-back inclinable power press：雙柱開(kāi)式可傾壓力機(jī)

double column milling machine 雙柱銑床 | double column open-back inclinable power press 雙柱開(kāi)式可傾壓力機(jī) | double column open-back press with fixed bed 雙柱開(kāi)式固定臺(tái)壓力機(jī)

double column open-back press with fixed bed：雙柱開(kāi)式固定臺(tái)壓力機(jī)

double column open-back inclinable power press 雙柱開(kāi)式可傾壓力機(jī) | double column open-back press with fixed bed 雙柱開(kāi)式固定臺(tái)壓力機(jī) | double column planer 雙柱刨床

Double Salchow：二周沙克跳

2.Double Toe-walley二周點(diǎn)華利跳 | 3.Double Salchow二周沙克跳 | 4.Double Flip二周菲利普跳

double phantom circuit：雙幻像電路

double petticoat insulator ==> 雙裙絕緣子 | double phantom circuit ==> 雙幻像電路 | double phase fault ==> 雙相短路故障

double pin sucker rod：兩頭陽(yáng)螺紋的抽油桿

double pin sub 兩頭陽(yáng)螺紋接頭 | double pin sucker rod 兩頭陽(yáng)螺紋的抽油桿 | double pipe longitudinal finned exchanger 套管式縱向翅片管換熱器

Double plate clutch：雙盤離合器

Double piston type vauum servo brake 雙活塞真空助力制動(dòng)器 | Double plate clutch 雙盤離合器 | Double reduction rear axle 兩級(jí)減速后軸

Double plate clutch：雙盤式離合器

double overhead camshafts 雙頂置凸輪軸 | double-plate clutch 雙盤式離合器 | double-tee 工字形的

Double plate clutch：雙片式離合器

double-piston 雙活塞 | double-plate clutch 雙片式離合器 | double-plunger plastic injection moulding machine 雙柱塞塑料注模機(jī)

Double plate clutch：雙片離合器

double planetary torque hub component;二級(jí)行星齒輪扭力輪轂部件 | double plate clutch;雙片離合器 | double ratchet;雙向棘輪機(jī)構(gòu)