这种空压机气缸中基本上不含油，其活塞环和填料一般为聚四氟乙烯。
This kind of air compressor cylinder basically does not include any oil content in, the piston ring and packing is commonly ptfe.
改造后已连续使用12000小时，结果证明，活塞杆和填料的磨损减少，曲轴箱窜气量变小。
Continuously running of the improved air compressor for 12000 hours showed that the abrasion between piston rods and packings reduced, while the amount of air leaking to crankcase decreased.
这种压缩机气缸中基本上不含油，其活塞环和填料一般为聚四氟乙烯。
Basically, this compressor is not in the oil cylinder, the piston ring and packing usually PTFE.
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