Beijing Huasheng Precious metal Materials Co., LTD., Yashinzwe mu 2003, yakoraga mu bucukuzi bw'amabuye y'agaciro (tungsten, molybdenum, tantalum, niobium, nikel, cobalt, ferroalloy and charge) igihe kinini. Umusaruro mwinshi no gutunganya: tungsten na molybdenum ibicuruzwa, tantalum na niobium pro ...
Soma byinshi