ʻO Beijing Huasheng Precious Metal Materials Co., LTD., i hoʻokumu ʻia i ka makahiki 2003, ua hana i nā metala non-ferrous (tungsten, molybdenum, tantalum, niobium, nickel, cobalt, ferroalloy a me ka uku) no ka manawa lōʻihi. tungsten a me nā huahana molybdenum, tantalum a me niobium pro...
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