Qhia: Hauv peb lub tuam txhab, peb muaj ntau yam ntawm hydraulic presses, tsim kom tau raws li cov kev lag luam ntawm hydraulics los muab cov kev ceev ntawm kev txav mus los, loj thiab zoo li qub. Cia peb tshawb paub tias cov tshuab ua tau zoo tshiab li cas ...