Double step joint：兩段斜接頭

"兩階壓縮","Double stage compression" | "兩段斜接頭","Double step joint" | "雙層濾過器","Double strainer"

Double Star Position System：雙星定位系統(tǒng)

雙主體稅:Double-Principal Taxes System | 雙星定位系統(tǒng):Double Star Position System | "新兩田制":New Double Land System

double star point：雙星點(diǎn)

double star connection ==> 雙星形聯(lián)接=>二重星形結(jié)線 | double star point ==> 雙星點(diǎn) | double star rectifier circuit ==> 雙重星形整流電路

double-reduction spur pinion：復(fù)式減速小正齒輪

double-reduction shaft ==> 復(fù)式減速軸 | double-reduction spur pinion ==> 復(fù)式減速小正齒輪 | double-reheat steam turbine ==> 中間再熱式汽輪機(jī)

double-head spring needle knitting machine：汗絨布二用針織機(jī)

double-head rail 雙頭軌 | double-head spring needle knitting machine 汗絨布二用針織機(jī) | double-head turning tool welded with carbide tip 硬質(zhì)合金雙頭車刀

double span trussed roof structure：雙跨屋架結(jié)構(gòu)

double source ==> 雙源 | double span trussed roof structure ==> 雙跨屋架結(jié)構(gòu) | double span wire system ==> 雙拉線式

double-face sluice valve：雙面閘閥

double-evaporation boiler 兩極蒸發(fā)鍋爐 | double-face sluice valve 雙面閘閥 | double-faced box slide valve 雙面滑閥

Double Slip Switch：雙交叉轉(zhuǎn)轍器

Double Crossover 交叉橫越線 | Double Slip Switch 雙交叉轉(zhuǎn)轍器 | Double Track 雙軌

Double Slip Switch：雙交叉轉(zhuǎn)轍器(鐵路)

雙滑件機(jī)構(gòu) double slider machanism | 雙交叉轉(zhuǎn)轍器(鐵路) double slip switch | 雙火星塞點(diǎn)火 double spark plug ignition

Double Slip Switch：雙動轉(zhuǎn)轍器

double-pole switch 雙刀開關(guān); 雙極開關(guān) | double-slip switch 雙動轉(zhuǎn)轍器 | double-throw disconnecting switch 雙投隔離開關(guān)