基本解释

• [机械工程]半圆头六角孔螺丝

英汉例句

双语例句

• Includes Low Head, Button Head, and Flat Head Screws, as well as special Socket Cap Screws such as Vented, Drilled Head, Self-Locking, and more.
  包括低压头，半圆头及平头螺丝以及特殊内六角圆柱头螺钉如排空，钻孔头，自锁，等等。

专业释义

机械工程

• 半圆头六角孔螺丝