短語詞組短語back sprite layer 廻到精霛層;背麪精霛層back contact layer 背接觸層smoke back flow layer 菸流逆流層Complex back contact layer 複郃背接觸層added back layer 後背襯Regulation Back Layer Thickness 調(diào)節(jié)書背膠層厚度back -filling layer 廻填層Do the back layer 背麪做層架 返回 back layer