Such as whether the bolt is tightened, the piston ring is installed correctly, damaged oil seal is replaced, etc.
譬如螺栓是否拧紧,活塞环安装是否正确,损坏油封是否更换等。
2
This paper introduced a four-body contact model of steel crown-the nodular cast-iron skirt-piston pin-connecting bolt for the steel-crown aluminum-skirt composite piston of locomotive diesel engines.