double circle "8：雙圈""8""字式

double cart wheel 雙側(cè)翻 | double circle "8" 雙圈"8"字式 | double court 雙打球場

double intended circle：雙凹圓

double integral 重積分 | double intended circle 雙凹圓 | double interpolation 雙內(nèi)插

double wall knot：雙花繩端結(jié)

double volute pump 雙蝸殼式離心泵 | double wall knot 雙花繩端結(jié) | double wall piping system 雙層壁管系

double broadswords：雙刀

61) 雙棍 double staffs | 62) 雙刀 double broadswords | 63) 雙手刀 double handed broadswords

double handed broadswords：雙手刀

62) 雙刀 double broadswords | 63) 雙手刀 double handed broadswords | 64) 雙頭雙槍 double two-headed spears

double spiral staircase：雙螺旋樓梯

double spine saw ==> 復(fù)齒鋸 | double spiral staircase ==> 雙螺旋樓梯 | double spiral turbine ==> 雙排量渦殼式水輪機(jī)

double snap roll：雙快滾

double slotted flap 雙縫襟翼 | double snap roll 雙快滾 | double spar wing 雙樑機(jī)翼

double rotary engine：雙排缸回轉(zhuǎn)引擎

688 雙行鉚接 double rivet joint | 689 雙排缸回轉(zhuǎn)引擎 double rotary engine | 690 雙座停止閥 double seat stop valve

double rotary engine：雙排缸旋轉(zhuǎn)引擎

雙滾子導(dǎo)索器 double roller chock | 雙排缸旋轉(zhuǎn)引擎 double rotary engine | 雙排缸回轉(zhuǎn)引擎 double rotary engine

double-flow reaction turbine：雙流反動式汽輪機(jī)

double-faced pallet 雙面托盤 | double-flow reaction turbine 雙流反動式汽輪機(jī) | double-flow steam turbine 雙流式汽輪機(jī)