What is the female thread?
A、itistheleft-handthreadexecutedbothonthescrewshanksandinsidethestructureholes
B、itisthethreadexecutedinsidetheholeinwhichthescrewsareinserted
C、itisthethreadexecutedontheshankofthescrews
发布时间：2025-07-17 19:28:14
