说明:用于选别粒度2-0.02毫米矿砂及矿泥级别的钨、锡、铌、锰、铬、钛、铅、锌、金、铁(赤铁、褐铁)等金属矿物。 Explains:Uses in to classify the granularity 2-0.02 millimeters ore and ore slime the rank tungsten,the tin,the niobium,the manganese,thechromium,the titanium,the lead ,the zinc,the gold ,the iron(rediron,brown iron)and so on the metallic minerals.