FORMSPRAG-CLUTCH

Peb tau zoo-paub tias yog ib qho ntawm cov thawj coj formsprag- clutch lwm tus neeg nyob hauv Suav teb. Thov koj xav tias dawb mus yuav kev cai ua formsprag-clutch los ntawm peb lub hoobkas. Cov kev pabcuam zoo thiab cov khoom zoo yog muaj.