double bottom afterward：尾部雙層底

double bond 雙鍵接頭 | double bottom afterward 尾部雙層底 | double bottom center 雙層底中心

double alpaca：雙面阿爾帕卡呢

double acid phosphate 雙料過磷酸鈣 | double alpaca 雙面阿爾帕卡呢 | double and twist denim 雙色緯紗粗斜紋布

double ambiguousness：兩歧性

雙棲性:double-dwelling | 兩歧性:double ambiguousness | 雙功能:double-function

double anastigmat：雙正光鏡頭

雙正方向投影 double azimuthal map projection | 雙正光鏡頭 double anastigmat | 雙重和,航帶誤差 double summation

double-throw disconnecting switch：雙投隔離開關(guān)

double-pole double throw switch 雙刀雙擲開關(guān) | double-throw disconnecting switch 雙投隔離開關(guān) | double-throw switch 雙投開關(guān); 雙擲開關(guān)

double hexagon end cap wrench：六角螺帽雙頭扳手

double end "alligator type "wrench 雙頭鱷口扳手, 雙頭管扳手 | double hexagon end cap wrench 六角螺帽雙頭扳手 | double hexagon opening double offset box socket wrench 雙頭彎脖梅花扳手

switch; double-pole single-throw：雙極單投開關(guān)

雙極雙投開關(guān) switch, double-pole double-throw | 雙極單投開關(guān) switch, double-pole single-throw | 雙投開關(guān) switch, double-throw

double-door drop-bottom bucket：對開底卸料斗

double-disk winding ==> 雙盤型線圈 | double-door drop-bottom bucket ==> 對開底卸料斗 | double-double effect ==> 雙偶效應(yīng)

double lever safety valve：雙杠桿安全閥

double lens 雙透鏡 | double lever safety valve 雙杠桿安全閥 | double lift double cylinder jacquard 復(fù)動式雙花筒提花機(jī)

double pole mast：雙桿輕便井架

double pole double throw 雙刀雙擲 | double pole mast 雙桿輕便井架 | double pole single throw 雙刀單擲