Cov cuab yeej yuav tsum tau xa hnub no yogHlau Bunching Mmob siab, cov neeg ua haujlwm tuaj rau ntawm lub rooj cob qhia thaum sawv ntxov los npaj rau kev ntim khoom kom tsis txhob ncua sijhawm xa khoom.
Lub tshuab no yog siv rau twisting tooj liab xov hlau ntau tshaj 7 xov hlau.In ntau lawm, lub tshuab tuaj yeem nres yog tias cov hlau tawg.Qhov nqa-up nro yog tswj los ntawm magnetic hmoov clutch los yog txhua yam hom.Nws kuj muaj ntau lawm, tsis tshua muaj suab nrov thiab yooj yim rau kev khiav lag luam.
