- Tin OriginTin, also known as tin plates, is made of tin-plated steel sheet substrate. Low carbon steel sheet as the substrate material, its thickness is 0.1 ~ 0.4mm.
Date：2014-11-14 - How to Protect the Surface of the Springs?How to protect the surface of the spring? Spring surface is generally treated as black (blue), phosphate, electroplating, spray and so on.
In recent years, there was zinc chromate film DACROMET and i ……
Date：2014-03-19 - How to Protect the Surface of the Springs?How to protect the surface of the spring? Spring surface is generally treated as black (blue), phosphate, electroplating, spray and so on.
In recent years, there was zinc chromate film DACROMET and i ……
Date：2014-03-19
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