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back draft explosion：逆通风爆炸

back down 撤退 | back draft explosion 逆通风爆炸 | back draft 逆通风

back draft zone：后牵伸区

"后牵伸","back draft" | "后牵伸区","back draft zone" | "后延伸罗拉","back drawing roller"

back electromotive force：反电动势

back discharge 反向放电 | back electromotive force 反电动势 | back elevation 背立面图

back electromotive force：逆电动势;反电动势

back donation 逆给予 | back electromotive force 逆电动势;反电动势 | back extraction method 逆萃取法;反萃取法

back electromotive force cell：反压电池

back electromotive force 反电动势 | back electromotive force cell 反压电池 | back fire 逆弧,回火

back electromotive force cell：反电动势电池

"back drying machine","再乾机" | "back electromotive force cell","反电动势电池" | "back flash arrester","回闪阻止器"

back electromotive force coefficient：反电势系数

back electromotive force cell 反压电池 | back electromotive force coefficient 反电势系数 | back elevation 后视图,背面立视图,背视图

back electromotive force constant：反电动势常数

反电动势 back electromotive force | 反电动势常数 back electromotive force constant | 后视图;背立面图 back elevation

back end processing：后端处理

back edge 下降边 | back end processing 后端处理 | back gate mos 反向栅偏置金属氧化物半导体

back end crops：切尾

back end尾端 | back end crops切尾 | back end whip(活套的)甩尾

air ventilator：通风管

air purifier 空气滤清剂 | air ventilator 通风管 | air-bleed 空气分泄器

sound motion picture, talkie：有声电影

silent cinema, silent films 无声电影 | sound motion picture, talkie 有声电影 | cinemascope, CinemaScope 西涅玛斯科普型立体声宽银幕电影,变 形镜头式宽银幕电影