砂粉砂

mixture of ores and fluxes sand mixture sand clay organic clay sand silt sand and gravel overlay sand and cement mixer preheating of the mixture uniformity of mixture proportion of mixture adjustment of mixture enrichment of mixture contain a lot of sand and clay unconsolidated silt and fine sand type clay silt clay sand mixture of gasoline and alcohol clay-graphite mixture oil-clay mixture mixture of boric acid and bleaching powder mixture of Indian alfalfa and red clover