短語(yǔ)詞組短語(yǔ)Rack to Back Credit 背對(duì)背信用證full rack back position 齒條后退極限位置back rack 背后接線架;經(jīng)紗張力調(diào)整機(jī);后架back rack angle 縱向角Push Back Rack 后推式貨架;后推式料架;后推貨架Push -Back Rack 后推式貨架back shading rack 反遮架;反向電阻 返回 rack back