<正>A new style of hydraulic steel gate based on the principle of bionics is proposed in this paper. It has a fish-like ......

<正> 我厂为烟叶公司设计并制造的烟叶烘烤机,共需图1所示的钢板门20个。钢板门全部采用薄板制造,骨架是用2mm厚冷轧低碳钢板(材质......