词典释义：
埋头钉
Hexalobular socket countersunk head tapping screws.
沉头内六角攻丝螺钉。
Hexalobular socket countersunk head tapping screws .
沉头内六角攻丝螺钉。
Nickel-plated mild steel countersunk head machine screw
镀镍低碳钢平头机器螺丝
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