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在活塞组的装配前，先将气缸内表面清洗干净，涂上机油。并检查活塞组件的各个零件有无损伤，再清洗干净，然后将其放入气缸内作漏光检查。要求活塞环在整个圆周面上的漏光不应多于两处，每处不得超过 45°弧长，漏光处与活塞环开口处距离应大于 30°。 为了避免活塞环工作受热
Before the assembly of the piston group, first clean the cylinder surface, coated with oil. And check the various components of the piston assembly for damage, and then clean, and then put it into the cylinder for light leakage inspection. Requirements of the piston ring in the entire circumference of the light leakage should not be more than two, each should not exceed 45 ° arc length, light leakage and piston ring openings should be greater than 30 °. In order to avoid the work of the piston ring heat