double-U butt weld：雙U形對接焊

double-J groove weld || 雙J形槽焊 | double-U butt weld || 雙U形對接焊 | double-U groove || 雙面U形坡口

double cylinder rim drawback lock：雙舌彈子門鎖

double cylinder press 雙滾筒印刷機 | double cylinder rim drawback lock 雙舌彈子門鎖 | double cylinder slip pump 雙缸泥漿泵

double-sided drawing press：雙邊拉壓機

double-sided diskette 雙面軟盤 | double-sided drawing press 雙邊拉壓機 | double-sided floppy 雙面軟磁盤

double drift region avalanche diode：雙漂移雪崩二極管

double base diode雙基極二極管, 單結(jié)晶體管 | double drift region avalanche diode雙漂移雪崩二極管 | double heatsink diode雙重散熱片二極管

(d)double drum dryer with spray feed：噴灑加料式雙滾筒干燥器

(c)double drum dryer with splash feed飛濺布料式雙滾筒干燥器 | (d)double drum dryer with spray feed噴灑加料式雙滾筒干燥器 | (e)vacuum double drum dryer 雙滾筒真空干燥器

double cage type mechanical drum washer：雙籠式機械洗桶機

double cable winch 雙索卷揚機 | double cage type mechanical drum washer 雙籠式機械洗桶機 | double cage type motor 雙鼠籠式電動機

double tariff electricity meter：二部電價制電度計,雙價電度表

"double T steel ","H形鋼,工字鋼" | "double tariff electricity meter ","二部電價制電度計,雙價電度表" | "double tariff meter ","二部電價制電度表"

double wedge airfoils：雙楔翼型

double wave detection || 全波檢波 | double wedge airfoils || 雙楔翼型 | double wing spar || 雙翼梁

double plate for anodes：陽極包板/墊板

double groove 雙面坡口 | double plate for anodes 陽極包板/墊板 | double probe method 雙探頭法

double armouring：復式鋼筋

double angle 雙角鋼 | double armouring 復式鋼筋 | double batten 雙重板條