晴朗的海01
Piston Pin Hole . eg.0.002mm直销孔圆度/Straight Pin Hole Roundness. 0.001mm 缸径cylinder boreLathe for Piston Ring活塞环环数 piston compression活塞压缩高活塞平均速度mean piston speed 发动机转速engine speed (rotational frequency)气缸体机架cylinder block frame Bore and stroke 缸径与冲程Cylinder clearance volume 气缸 Mean piston speed 活塞平均速度
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