词汇	primary return air system
释义	primary return air system 一次回风系统
随便看	attaching space attaching spokes attaching strings to TEA bags attaching subtask attaching task attaching tear strings in the working of paper attaching terminal attaching the caps to the spindles attaching the cutting edges attaching the data back attaching the strap attaching the web end attaching the web end to the mandrel attaching thread attaching to attaching to cards attaching to cigarettes attaching to cigars attaching together attaching together by means of adhesive attaching together paper attaching together paper, cardboard strips attaching together paper sheets, strips, webs attaching together, permanently attaching together slottings, webs by slotting