Zhuhai feldspar tests, laboratory feldspar Huizhou, Guangdong and feldspar taste tests with parts ..

Testing and counseling week S13538212153 online QQ2664618914 precious metals include platinum, palladium, rhodium, iridium, ruthenium, osmium and gold, silver and eight elements, precious metal materials are widely used in modern industry and electronic information technology, new energy technologies and environmental technologies It plays an irreplaceable role, so the price of precious metals is relatively high. Sources of precious metals are extracted from ore in precious metals, precious metals required prior to the extraction of precious metals mining were identified for testing.