Vim li cas cov rivets dig muag thiaj hloov tau cov rivets khov kho?

Cov rivets uas siv rau hauv cov qauv siv tau los hloov cov rivets khov kho ib txheej vim tias tsuas yog ib sab ntawm cov khoom ua haujlwm siv rau kev teeb tsa, tab sis cov rivets khov kho ib txheej tsuas yog tuaj yeem teeb tsa siv ob qho kawg ntawm cov khoom ua haujlwm. Cov studs rub kuj txuag tau ntau dua li cov rivets khov kho ib txheej.