backing n.后退,衬背,后援,支持者衬...backing-out 取消,退出,逆序操作...backing-off lathe 铲齿车床...busy-backing 忙碌地回答...aluminum foil backing paper 铝箔衬纸...alloy backing 合金牙背...backing memory 后备存储器...aluminum foil with paper backing 垫纸铝箔...silicon backing wafer 硅衬片...backing sheet 支撑片,备用表副份...backing stage 前级...backing weld(ing) 打底焊...backing a bill 背书担保一张票据...backing sand 背砂...backing up 回投,回冲,回行...welding backing 焊接衬垫...backing vacuum 前级真空...backing pump 前级泵...backing paper 背纸,底子纸...backing board 底板...backing storage 后备存储器...
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