Cov teeb meem nrog cov khoom siv tam sim no yog dab tsi?
Xau tsoo: pwm, yeeb nkab.
Kev saib xyuas cov phom hydraulic lub cev tsis nyob hauv qhov chaw.
③ Ua tsis zoo rau cov khoom siv.
Cov teeb meem nrog cov khoom siv tam sim no yog dab tsi?
Xau tsoo: pwm, yeeb nkab.
Kev saib xyuas cov phom hydraulic lub cev tsis nyob hauv qhov chaw.
③ Ua tsis zoo rau cov khoom siv.