Daim Ntawv Thov Kev Ua Si ntawm Tawb Of Elevator

Cov khoom siv ntawm cov khoom siv hauv tsev, tshuab, kev lag luam tshuaj, rau kev lag luam muaj tshuaj, rau cov ntaub ntawv teeb pom kev zoo li cov hmoov qis, thiab tej daim me me. Piv txwv li, nws tuaj yeem siv los thauj thaiv thiab cov ntaub ntawv av granular, thee, qhuav av nplaum, thiab cov hmoov nplej qhuav uas tau dhau los ntawm crushers.