B 開頭單詞

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