Secondly, through the laser craft test, the rational laser honing craft parameters are determined, which are used to process the flat sample and internal-combustion engine cylinder wall.

其次，通过激光工艺试验，研究确定合理的激光珩磨工艺参数，在平板试样和内燃机缸套上进行激光微观造型。

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You have to mix oil into the gas in a two-stroke engine because the holes in the cylinder wall prevent the use of rings to seal the combustion chamber.

在二冲程发动机中你必须混和燃料和气体，因为气缸壁上的孔阻止使用活塞环密封燃烧室。

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In the two-cycle engine, the piston ACTS as a valve, clearing valve ports in the cylinder wall as it nears BDC.

在二行程发动机中，活塞起到阀门的作用，当活塞接近下止点时，使气缸壁上的进排气口打开。

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