A piston
分类：轮机英语小册子
A piston consists of a lower part-piston skirt of cast iron and an upper part or crown made of special heat-resistant steel. They are bolted together and fixed to the piston rod.
分类：轮机英语小册子
A piston consists of a lower part-piston skirt of cast iron and an upper part or crown made of special heat-resistant steel. They are bolted together and fixed to the piston rod.