Гантиг хэрхэн нарийн нунтаг болгон боловсруулах вэ?
Marble powder requirements Marble is recrystallized limestone, its mainly composed of CaCO3, calcite, limestone, serpentine and dolomite, Mohs hardness is 2.5 to 5. Limestone softens under high temperature and pressure, and recrystallizes to …