double rail track circuit：雙軌道電路

double pole switch 雙刀開關(guān) | double rail track circuit 雙軌道電路 | double range drive 雙量程傳動

double rail track circuit：雙軌軌道回路

"double radial engine","雙排星形發(fā)動機" | "double rail track circuit","雙軌軌道回路" | "double reduction","雙級減速"

double rail track circuit：雙軌條軌道電路

3140 double-rail retarder 雙軌條車輛減速器 | 3141 double-rail track circuit 雙軌條軌道電路 | 3142 double-sided shunting signal 雙面調(diào)車信號機

double side razor blade：雙面保險刀

double saw 復齒鋸 | double side razor blade 雙面保險刀 | double spine saw 復齒鋸

double side razor blade：雙面保險儀

double saw復齒鋸 | double side razor blade 雙面保險儀 | double spine saw復齒鋸

double rear vault：雙臂騰越

double play 雙殺 | double rear vault 雙臂騰越 | double referee system 雙裁判制

double wheel plow：雙輪犁

double webbed wheel ==> 復板輪 | double wheel plow ==> 雙輪犁 | double winding armature ==> 雙繞組電樞

double wheel lathe：雙輪式車床

double weight paper 厚紙 | double wheel lathe 雙輪式車床 | double wheel pulley 雙輪環(huán)式滑車

double wall box：復壁紙箱

double vat-lined 兩面圓網(wǎng)紙板面層 | double wall box 復壁紙箱 | double wall cooling roll 復壁冷卻輥

double trolley electric locomotive：雙觸輪電機車

double triode 雙三極管 | double trolley electric locomotive 雙觸輪電機車 | double tubing mercurial barometer 雙管水銀氣壓表