Kev Ntsuas Dej Kub Dej Kub Kub Rau Cov Hluav Taws Xob

Qhov loj thiab qhov ntev ntawm qhov ntsuas ntawm cov yeeb nkab seem yog li 100 hli. Kev kho los tiv thaiv corrosion yuav tsum tau nqa tawm ntawm qhov chaw ntawm cov yeeb nkab seem. Cov kav dej yog muab tso rau hauv dej distilled ntawm (70 ± 2) degree rau 30 d. Tom qab qhov kev xeem, nws raug tshem tawm thiab txias rau hauv chav tsev kub, thiab cov khoom kuaj tau raug kuaj xyuas. Rau cov txheej txheej sab hauv, cov txiaj ntsig kev xeem yuav tsum ua raws li cov cai ntawm 5.15.