短语词组短语roll plate bending machine 三辊弯板机;四辊卷板机roll -bending 滚弯four -roll plate bending 薄板滚弯成形4 -roll plate bending machine 滑板式工作台three -roll plate bending machine 三辊弯板机finite element in roll -bending 钢辊弯成型有限元 返回 roll bending