螺母是用於組裝機構零配件的鎖緊零件,可以承受振動，中心有孔洞，孔的內側

螺母是用於組裝機構零配件的鎖緊零件,可以承受振動，中心有孔洞，孔的內側有旋紋，

結果 (英文) 1:

The nut is a locking part used to assemble the parts of the mechanism. It can withstand vibration. There is a hole in the center and a spiral on the inside of the hole.

結果 (英文) 2:

The nut is a locking part used for assembling mechanism parts, which can withstand vibration. There is a hole in the center and a thread on the inner side of the hole,

結果 (英文) 3:

Nut is a locking part for assembling parts of mechanism, which can bear vibration. There is a hole in the center, and the inner side of the hole has a spiral pattern.