Muab ntau cov qauv, cov kev qhia tshwj xeeb, cov hlab ntsha, cov yeeb yam, thiab kev teeb tsa kom tau raws li cov cai thov sib txawv.
Cim npe nrov: Cov kev ua yeeb yam pneumatic ntau yam xav tau cov tshuab muaj kev xav tau, Tuam Tshoj, cov chaw tsim khoom, chaw tsim khoom, tus nqi, kev muag khoom, hauv Tshuag, qauv dawb
