Kev thov ntau ntawm lub dav hlau twj tso kua mis
Lub dav hlau twj tso kua mis tsim nyog rau qhov kub thiab txias, ua haujlwm siab, thiab thaj chaw nqus tsev siab, xws li lub tshuab nqus tsev, nqus tsev kom qhuav, lub tshuab nqus tsev, ua lub tshuab nqus tsev, thiab tseem tuaj yeem nqa kua, alkali lossis kev ncua uas muaj abrasives, thiab kuj tsim nyog rau cov ib puag ncig tshwj xeeb. nrog hluav taws xob muaj zog.