埋头螺钉,埋头螺丝;
Slotted oval countersunk head wood screw
一字槽椭圆沉头木螺丝
Cross recessed countersunk head screw and countersunk serrated external toothed lock washer assemblies
GB/T9074.9-1988十字槽沉头螺钉和锥形锁紧垫圈组合件
Side view of raised countersunk slotted screw with adjustable thread length.
螺纹长度可调整的半埋头一字槽螺钉的侧面图.
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