Sib Nqus Pulley

Raws li ib qho ntawm cov kws tshaj lij magnetic pulley tuam ntxhab thiab cov muag khoom hauv Suav teb, peb tau tshwj xeeb los ntawm cov khoom zoo thiab cov kev pabcuam zoo. Thov koj xav tias dawb mus yuav magnetic pulley muag ntawm no los ntawm peb lub hoobkas.