安装本发 明磁环的活塞，活塞可以做成带槽的一体结构，节约了活塞加工的原材料和加工费，磁环在活塞上的安装过程省时又省力。
The piston with the combined magnetic ring installed may be one integral structure with slot, and this results in saving in material and making cost, and easy installation of the ring to the piston.
安装本发 明磁环的活塞，活塞可以做成带槽的一体结构，节约了活塞加工的原材料和加工费，磁环在活塞上的安装过程省时又省力。
The piston with the combined magnetic ring installed may be one integral structure with slot, and this results in saving in material and making cost, and easy installation of the ring to the piston.
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