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。
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。
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