半精加工的活塞是加大尺寸的，必须进行修整以便与气缸相配合。
Semifinished pistons are oversize and must be finished down to size to fit the cylinders.
最后还利用GLIDE软件对活塞在冲程加大后的运动及受力进行了模拟分析，简要的概括了行程加大后活塞和缸套的工作状况。
Finally, GLIDE software is used for analysis of the movement and force of the piston after increasing the stroke, summarizing the operation situation of the piston and cylinder liner.
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