Zhongshan Jinwen Hardware Parts Co., LTD happy Chaoshan three-day tour
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...
In the parts processing industry, the most taboo problem is the deformation of parts, once it appears, the consequences will be unimaginable, one affect the eco...
The main characteristics that reflect the quality of direct plating are the conductivity of hole wall and the deposition rate of copper plating layer....
Zinc dissolves easily in acids and also in alkalis, so it is called an amphoteric metal. Zinc changes little in dry air. In moist air, the zinc surfac...