B 開頭單詞

backing run 封底焊

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)] 初級抽氣泵；[機(jī)] 前級泵

backing pulley [機(jī)械工程]回行皮帶輪回行皮帶盤

backing propeller test [交通運(yùn)輸工程]螺旋槳反轉(zhuǎn)試驗(yàn)

backing power n. [車輛] 倒車功率，后退功率；后退力

backing plate 墊板；[機(jī)] 背板；制動底板

backing plank [土木建筑工程]襯板

backing pass 底焊焊道；背焊道；封底焊

backing paper 底子紙；背紙

backing out 回退；現(xiàn)場恢復(fù)

backing off attachment [機(jī)械工程]鏟齒裝置

backing off 反饋；退繞；鏟齒

backing of window [地球科學(xué)]窗托

backing of smoke [地球科學(xué)]推回火災(zāi)煙霧

backing memory 后備存儲器

backing material [材] 基底材料