double S 22-degree angle wrench：雙S形22度斜口扳手

double rubberized fabric 雙層膠布 | double S 22-degree angle wrench 雙S形22度斜口扳手 | double safety pressure cooker 雙保險壓力鍋

double t iron：工字鋼

double suction pump 雙吸泵 | double t iron 工字鋼 | double tail 雙尾翼

double t iron：工字鐵

double strand mill 雙線軋機 | double t iron 工字鐵 | double tempering 二重回火

double t iron：工冷凍干燥機字鐵

double strand mill 雙線軋機 | double t iron 工冷凍干燥機字鐵 | double tempering 二重回火

double T joint：十字接頭

double swivel hook 雙旋轉鉤 | double T joint 十字接頭 | double T steel I字鋼

double-focus X-ray tube：雙焦點X射線管

double-focusing mass spectroscope,雙聚焦質譜儀器 | double-focus X-ray tube,雙焦點X射線管 | double focusing,雙聚焦

double-focus X-ray tube：雙焦點

double-focusing mass spectroscope 雙聚焦質譜儀器 | double-focus X-ray tube 雙焦點 | double focusing 雙聚焦

double Y connection：雙星形連接,YY連接[法]

"double wound synchronous generator ","雙線繞式同步發(fā)電機" | "double Y connection ","雙星形連接,YY連接[法]" | "double zigzag connection ","雙曲折連接,雙曲折接法"

double needle loom：雙導緯針織帶機

double needle bed machine 雙針床針織機 | double needle loom 雙導緯針織帶機 | double non-return valve 雙止回閥

double needle telegraph：雙針電報

"double motor alternator ","雙電動[同步]發(fā)電機" | "double needle telegraph ","雙針電報" | "double oscillation ","雙振蕩[的]"