Daim ntawv thov: Kev Tsav Tsheb Ib Leeg Siab Siab Cov Menyuam Yaus - Series PGM tshwj xeeb tsim los ua ntej sib tsoo cov cement clinkers, cov ntxhia pob zeb, cov hlau clinkers thiab lwm yam rau hauv cov granules me me, txhawm rau txhawm rau ultra-tshem cov hlau tsis huv (hlau ores, manganese ores, tooj liab. ore, lead-zinc ores, vanadium ores thiab lwm yam) thiab zom cov khoom tsis yog hlau (cov thee gangues, feldspar, nepheline, dolomite, limestone, quartz, thiab lwm yam) rau hauv cov hmoov.