GVDA tsim kho tshiab refractometer cov cheeb tsam thaj chaw muaj sia nyob sab hauv st335A hauv cov khoom lag luam
Lub Refractometer cov thaj chaw muaj suab thaj nyob sab thaj Nws yog dav siv nyob rau hauv qab zib, dej thiab lwm yam muaj cov kev lag luam, nrog rau kev ua liaj ua teb tsim khoom thiab kev tshawb fawb. Nws yog tsim rau cov ntsiab lus qab zib ntsuas cov khoom siv cov kua qab zib muaj kua, thiab cov txheej txheem los ntawm kev cog cov txiv hmab txiv ntoo, rau kev faib tawm cov qoob loo.
