Beijing Huasheng Precious Metal Materials Co., LTD., yomwe idakhazikitsidwa mu 2003, yakhala ikupanga zitsulo zopanda chitsulo (tungsten, molybdenum, tantalum, niobium, faifi tambala, cobalt, ferroalloy ndi charge) kwa nthawi yayitali.Kupanga ndi kukonza kwakukulu: Tungsten ndi molybdenum mankhwala, tantalum ndi niobium pro ...
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