Loose hole plating chromic layer by weight used in the sliding friction parts and heat resistance, corrosion, wear parts, such as internalcombustionengine cylinder lumen, piston rings.
松孔镀铬层应用于受重压的滑动摩擦件及耐热、抗蚀、耐磨零件，如内燃机汽缸内腔、活塞环等。
2
Piston is one of the most important part in internalcombustionengine, which works in a extremely adverse condition.
活塞是内燃机上最重要的零件之一，工作条件极其恶劣。
3
Cylinder-piston system is the heart of internal-combustionengine. Cylinder liner cavitation is one of main disabled form.