查询词典 double-fault

double T joint：十字接头

double swivel hook 双旋转钩 | double T joint 十字接头 | double T steel I字钢

double-focus X-ray tube：双焦点X射线管

double-focusing mass spectroscope,双聚焦质谱仪器 | double-focus X-ray tube,双焦点X射线管 | double focusing,双聚焦

double-focus X-ray tube：双焦点

double-focusing mass spectroscope 双聚焦质谱仪器 | double-focus X-ray tube 双焦点 | double focusing 双聚焦

double Y connection：双星形连接,YY连接[法]

"double wound synchronous generator ","双线绕式同步发电机" | "double Y connection ","双星形连接,YY连接[法]" | "double zigzag connection ","双曲折连接,双曲折接法"

double needle loom：双导纬针织带机

double needle bed machine 双针床针织机 | double needle loom 双导纬针织带机 | double non-return valve 双止回阀

double needle telegraph：双针电报

"double motor alternator ","双电动[同步]发电机" | "double needle telegraph ","双针电报" | "double oscillation ","双振荡[的]"

double stapped joint：双面搭板接合

"double standard","双重标准" | "double stapped joint","双面搭板接合" | "double star connection","星星接法"

double-headed spicules：骨针

二重火山 double volcanoes | 骨针 double-headed spicules | 双倾褶曲 double-plunging fold

double-hook oil ring：双刃刮油环

double-helical gearbox 人字齿轮减速器 | double-hook oil ring 双刃刮油环 | double-hulled ship 双壳体船

double column open-back inclinable power press：双柱开式可倾压力机

double column milling machine 双柱铣床 | double column open-back inclinable power press 双柱开式可倾压力机 | double column open-back press with fixed bed 双柱开式固定台压力机

mine-run coal：原煤

"mine resistance","通风阻力 ; 矿阻" | "mine-run coal","原煤" | "mine salting","矿石渗杂"

PA: Pennsylvania：美国宾夕法尼亚州州名

ancestry 祖先(集合称), 家系, 血统 | Pa. Pennsylvania 美国宾夕法尼亚州州名 | booster locomotive 辅助机车