Kev ceev faj rau kev tshuaj xyuas cov roj lubricating ntawm khov nqaij slicer

1. Ua ntej, txiav cov khoom siv hluav taws xob tiv thaiv hluav taws xob, thiab tos kom cov nqaij khov khov kom txias;

2. Qhib cov roj ntws ntsaws thiab rho tawm cov qauv roj lubricating;

3. Tshawb xyuas cov viscosity Performance index ntawm cov roj: yog tias cov roj pom tseeb turbid, hloov nws sai li sai tau;

4. Rau cov nqaij khov khov nrog cov roj qib plugs, xyuas cov roj qib kom pom tias nws tsim nyog thiab nruab cov roj qib plugs.