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Zhongshan Jinwen Hardware Parts Co.,...

Zhongshan Jinwen Hardware Parts Co., LTD happy Chaoshan three-day tour

2023/3/31

The quality inspection method of di...

The main characteristics that reflect the quality of direct plating are the conductivity of hole wall and the deposition rate of copper plating layer. The condu...

2023/3/31

Professional answer: Why can stainle...

Previously, the dirtiest way we could distinguish stainless steel screws from iron ones was with a magnet. If you suck on this screw, if it sucks up, you know i...

2023/3/31

Why to remove Hydrogen in Electropla...

Grade 10.9 /12.9 /14.99 high strength alloy steel fasteners are manufactured in chrome-manganese or chrome-molybdenum alloy steels, generally with a hardness be...

2023/3/31

Common problem