我羧走进教室后，向窗外望去。
When I walked into the classroom, I looked out of the window.
羧采用液压传动，是目前国内液压单头冲孔机最新产品， 能对板钢冲孔。
Use of hydraulic, hydraulic single is currently the head punch products, steel punches.
羧采用液压传动，是目前国内液压单头冲孔机最新产品， 能对板钢冲孔。
Use of hydraulic, hydraulic single is currently the head punch products, steel punches.
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