Saj zawg zog roj hmab sib koom ua ke, uas tseem hu ua kev co absab, kev sib koom ua ke thiab lwm yam cua nruj thiab zoo nruab nrab-tiv taus thiab huab cua tsis kam.

Nta:

1.Me me, lub teeb nyob rau hauv wiehgt, zoo nyob rau hauv yoog, yooj yim rau kev teeb tsa thiab txij nkawm.

2.Thaum lub sij hawm insathlation, hloov, axial thiab angular qhov chaw tsis zoo yuav tshwm sim thiab nws tsis yog resricted thaum cov neeg siv yeeb nkab tsis yog-flue tsis sib xws.

3.Tus qauv-suab nrov tuaj yeem txo thaum ua haujlwm, thiab kev nqus cov peev xwm nqus tau muaj zog.