This kind of air compressor cylinder basically does not include any oil content in, the piston ring and packing is commonly ptfe.
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。
2
No. 3 cylinder checked and piston drawn out, packing renewed.
对第3号气缸进行了吊缸检查，更换了填料（盘根）。
3
The invention discloses a novel labyrinth compressor packing which is capable of automatic centering with a piston rod. The packing is provided with magnets.