Tsis siv neeg puv lim xovxwm, peb tuaj yeem nruab nrog lub twj tso kua mis, lim phaj shifter, drip tais, siv conveyor, thiab lwm yam.
Tsis siv neeg compress lim daim hlau, phau ntawv tso tawm lim ncuav mog qab zib, feem ntau rau cov xovxwm me me. Dav siv nyob rau hauv ceramic av nplaum, kaolin, daj caw pom, nplej caw pom, pob zeb khib nyiab, thiab cov khoom siv kev lag luam.