Kis Ncej

Transmission shafts yog ib feem tseem ceeb ntawm cov cuab yeej siv dav hauv ntau yam kev lag luam. Jinwang muaj cov txheej txheem tsim tshwj xeeb hauv kev tsim cov ncej tsav kom tau raws li lub cev lub zog thiab kev ua haujlwm ntawm cov ncej tsav hauv ib puag ncig siv tshwj xeeb.