Kev ruaj ntseg zoo
Jushuo Ntim ntiav cov cuab yeej kuaj xyuas meej, suav nrog vernier calipers, ntsuas hluav taws xob, ntsuas ntsuas tuab, qhov cub, viscosity testers, thiab cov tshuab ntsuas tensile, txhawm rau ntsuas qhov ntsuas qhov tseem ceeb xws li viscosity, tsim kua muag, thiab kav ntev. Nrog 6 cov txheej txheem tshuaj xyuas nruj uas npog cov ntaub ntawv raw rau cov khoom tiav, lub tuam txhab ua kom tiav cov khoom tsim nyog ntawm ntau dua 99%.