special self-locking screws
... 机加工 Mac你好ning 特殊防松螺丝 SPECIAL SELF-LOCKING SCREWS 突缘螺丝 FLANGE BOLTS (SCREWS) ...
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它是将特殊的工程树脂永久地粘附在螺牙上，产生永远牢固、永久使用、绝对环保的防松螺丝产品。
It is a special project to a permanent adhesive resin in the thread, have always solid, permanent use, absolute lock screw environmental products.
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