double-pointed nail：接合銷

double point threshold ==> 兩點差別閾 | double pointed nail ==> 接合銷 | double polarity method for calibrating thermocouple ==> 熱電偶雙級檢定法

Double-pointed hoe：兩頭鶴嘴鋤

復V字形切口 Double V-shaped incision | 兩頭鶴嘴鋤 Double-pointed hoe | 復心材 Double-summit

double-pointed tack：雙尖釘

double-point toothing ==> 雙點嚙合 | double-pointed tack ==> 雙尖釘 | double-pole connector ==> 雙極插接器

double-pole switch：雙刀開關

double phase short circuit 雙相短路 | double pole switch 雙刀開關 | double rail track circuit 雙軌道電路

double-pole switch：同上

double-gauss type lenses 雙高斯式物鏡 | double-pole switch 同上 | double-quantum stimulated-emission device 雙量子受激發(fā)射器

switch; double-pole single-throw：雙極單向開關

"switch; double-pole double-throw","雙極雙向開關" | "switch; double-pole single-throw","雙極單向開關" | "switch; emergency","緊急開關"

double-ported globe valve：雙座球閥

double-pitch roof 雙坡屋頂 | double-ported globe valve 雙座球閥 | double-row bearing 雙列軸承

double-riveted：雙行鉚接的

double-riveted seam 雙行鉚接縫 | double-riveted 雙行鉚接的 | double-rope pulley 雙索滑輪

double-riveted seam：雙行鉚接縫

double-rigging luff 雙套復滑車組 | double-riveted seam 雙行鉚接縫 | double-riveted 雙行鉚接的

double-riveted butt joint：雙列鉚釘對接

"復游標","double vernier" | "雙列鉚釘對接","double-riveted butt joint" | "雙列鉚釘搭接","double-riveted lap joint"