1. Petroleum -}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} machinery machinery} machineryue} based cleaner្ cleaner cleaner-} suitable machinery MACHREYE thiab khoom ntxuav.
2. Tshuaj ntxuav roj ntsha: cov tshuaj ntxuav roj ntsha yog cov kab mob sib xyaw ua ke xws li as 3 2}}
3. Lwm cov tshuaj ntxuav: thaum xaiv lub tshuab nqus tsev ntxhua khaub ncaws, xav txog thaj chaw tshwj xeeb raug ntxuav kom huv. Piv txwv li, rau kev tu cov nqaj hlau, xaiv lub tshuab nqus tsev nrog cov viscosity siab, thaum mus tu boilers, xaiv qhov siab- kub huv.