Feem ntau, cov txiaj ntsig ntawm rubble ua tiav rau hauv pob zeb yog li 80-90%, uas yog, ib tuj ntawm rubble tuaj yeem tawg 0.8-0.9 tons ntawm pob zeb, vim tias cov yam ntxwv ntawm cov pob zeb sib txawv ntawm cov cheeb tsam sib txawv, xws li: viscosity, hmoov cov ntsiab lus. Tus nqi, humidity, thiab lwm yam, yog tias cov av thiab impurity conten ...
Nyeem ntxiv