backing
习惯用语backing off1.■卸[退]下backing up1.■回投[冲, 行]have the full backing of1.■得到...的充分支持特殊用法acoustic backing1.■吸声衬垫aluminium backing1.■铝敷层copper backing1.■铜垫片, 铜衬底earth backing1.■复土, 还土film backing1.■防光晕层impregnated cloth backing1.■浸渍布基体liner backing1.■轴承衬支痤metal backing1.■金属背shot backing1.■填丸加固, 硬丸衬垫stereotype backing1.■铅版间隔纸tape backing1.■磁带背面backing of smoke1.■【采矿】推回火灾烟雾