1, mechanical stone processing, yooj yim dua thiab ceev, ib tug neeg muaj peev xwm ua hauj lwm, txuag lub sijhawm thiab kev rau siab.
2, saj yog ntau qhabnias, nrog lub ntuj tsw ntawm soybeans, tshiab saj authentic.
3, qhov khoom tsim ntawm ntsuab sandstone, sandstone muaj cov feem tsis tsim hardness thiab cov khoom zoo tshaj plaws granulation, nrog ib tug zoo nkauj tsos thiab practicality.
