在喷涂前，对轴类零件粗车螺纹并进行挤压，使基体表面形成钩子形状，增加喷涂层和基体的机械结合力；
Before spraying, the axes are turned out screw thread and extruded, thus many hooks are arranged on the surface of parts, it strengthens the mechanical combination of spraying layer and substrate;
在喷涂前，对轴类零件粗车螺纹并进行挤压，使基体表面形成钩子形状，增加喷涂层和基体的机械结合力；
Before spraying, the axes are turned out screw thread and extruded, thus many hooks are arranged on the surface of parts, it strengthens the mechanical combination of spraying layer and substrate;
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