What are the steps of the drywall screw production process
2020-6-5u2002·u2002The main thing for double-line fine teeth is phosphating and galvanized drywall screws, and galvanized drywall screws are only a supplement. Black phosphorus has a certain lubricity, and the attack speed is slightly faster; while the galvanized blue and white have a higher anti-rust effect than black phosphorus, and the product is lighter in ...
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