flat-head screw
... flat head 平封头 flat-head screw 平头螺丝 flat insulation material 扁平绝缘材料 ...
[机] grub screw
... GRPglass reinforced plast 玻璃丝加强塑料 grub screw 平头螺丝 GSPgroup supervisory panel 梯群监控 ...
flat head screws
... flask烧瓶 flat head screws平头螺丝 flat washer平面垫圈 ...