When inactive, the gates will lay flat on the seafloor; when water levels rise, they will be pumped full of air and rise above the surface to block sea water.
平时，闸门平铺在水底；在海水上涨时，闸门被注满空气，浮到水面阻隔海水。
Wear-and-tear is one of principal inactive forms of metallurgical spare parts. The laser reinforcing treatment of metallurgical spare parts surface is a new starting process in our country.
磨损是冶金备件主要的失效形式之一，用激光对冶金备件表面进行强化处理是目前国内刚刚起步的一项新工艺。
应用推荐