活塞四配套
   经特殊表面处理的活塞、缸套、活塞环、活塞销，恒温24小时后，进行优化分组，达到最佳装配状态。具有耐磨损、抗拉缸、降油耗、寿命长、环保等特点。
       After the special surface treatment piston, the cylinder jacket, thepiston curl, the piston pin, after the constant temperature 24 hours ,carry on the optimized grouping, achieve the best assembly condition. Has the wearability , anti- pulls the cylinder, falls the oilconsumption ,the life is long, characteristic and so on environmentalprotection.