Composite pistons of various types are widely used in internal combustion engines, such as steelcrown and aluminium skirt type, inner and outer pistons type, and so on.
在内燃机中组合式活塞结构应用广泛，例如钢顶铝裙活塞、内外组合活塞等。
2
This paper introduced a four-body contact model of steelcrown-the nodular cast-iron skirt-piston pin-connecting bolt for the steel-crown aluminum-skirt composite piston of locomotive diesel engines.
本文以机车柴油机钢顶铝裙组合活塞为对象，建立组合活塞钢顶铝裙连接螺栓-活塞销的四体接触计算模型。
3
Both watches have a stainless-steel case, an eye-catching crown and a black alligator leather strap. The watches allow for an engraving.