Qhov muag Bolt thiab qhov muag txiv ntseej yog siv rau fastening equipments. Tag nrho cov tshuab tsim khoom yuav tsum siv lawv. Qhov muag Bolt thiab Qhov muag txiv ntseej feem ntau yog siv rau engineering tsau pendant, lifting machinery, khoom siv thiab lwm yam kev tuav.
