Variation of the screw Angle results in reduction of purchase of the locking interface, or cross-threading the head.
螺钉角度的变异会致使锁定界面的减少或跨螺纹的头。
Flat-head inner hexagon screws instead the flat-heat cross-screw to increase the required installation and disassembly force.
原有平头十字螺丝改为平头内六角螺丝。以增强安装或拆卸止水栓时的力度需求。
A method for producing fiber-reinforced plastic screw-like fastening element including a thread portion and a head having a cross section which is larger than that of the thread portion.
一法生产纤维增强塑料螺钉拧等元素，其中包括一个线程部分和头部有一个截面，比线程的部分大。
A method for producing fiber-reinforced plastic screw-like fastening element including a thread portion and a head having a cross section which is larger than that of the thread portion.
一法生产纤维增强塑料螺钉拧等元素，其中包括一个线程部分和头部有一个截面，比线程的部分大。
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