backing run 封底焊backing rudder ship [航空、航天科學技術(shù)]倒車舵船backing roll 承壓滾筒 支承輥backing ring [機] 墊環(huán)backing resistance [能源科學技術(shù)]倒航阻力backing pump [機] 初級抽氣泵；[機] 前級泵backing pulley [機械工程]回行皮帶輪回行皮帶盤backing propeller test [交通運輸工程]螺旋槳反轉(zhuǎn)試驗backing power n. [車輛] 倒車功率，后退功率；后退力backing plate 墊板；[機] 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 [機械工程]鏟齒裝置backing off 反饋；退繞；鏟齒backing of window [地球科學]窗托backing of smoke [地球科學]推回火災(zāi)煙霧backing memory 后備存儲器backing material [材] 基底材料