The scroll wrap is the main movement part of compressor, only have the tooth, have no abrasion, thus the life is longer, so this is free maintenance compressor.

涡旋压缩机主要运动件涡盘只有啮合没有磨损，因而寿命更长，被誉为免维修压缩机。

Helps maintain the life of the rope by keeping it clean and resisting abrasion.

能够保持绳索干净，抗磨损，从而延长寿命。

It is put out that the injector and extruder are strengthened on the surface by laser surface alloy to improve its high temperature abrasion and lengthen life of the injector.

提出了采用激光表面合金化的方法对注塑机和挤出机螺杆表面进行强化，以提高其抗高温粘着磨损性能，延长注塑机使用寿命。