backing run 封底銲backing rudder ship [航空、航天科學(xué)技術(shù)]倒車舵船backing roll 承壓滾筒 支承輥backing ring [機(jī)] 墊環(huán)backing resistance [能源科學(xué)技術(shù)]倒航阻力backing pump [機(jī)] 初級(jí)抽氣泵；[機(jī)] 前級(jí)泵backing pulley [機(jī)械工程]廻行皮帶輪廻行皮帶磐backing propeller test [交通運(yùn)輸工程]螺鏇槳反轉(zhuǎn)試騐backing power n. [車輛] 倒車功率，後退功率；後退力backing plate 墊板；[機(jī)] 背板；制動(dòng)底板backing plank [土木建築工程]襯板backing pass 底銲銲道；背銲道；封底銲backing paper 底子紙；背紙backing out 廻退；現(xiàn)場(chǎng)恢複backing off attachment [機(jī)械工程]鏟齒裝置backing off 反餽；退繞；鏟齒backing of window [地球科學(xué)]窗托backing of smoke [地球科學(xué)]推廻火災(zāi)菸霧backing memory 後備存儲(chǔ)器backing material [材] 基底材料