Unlike steel, copper or aluminum, the profit margin on tungsten sales was very low or there was no profit at all and export sales could not help the producers.

• 与钢铁、铜或铝行业不同的是，钨产品销售的利润空间非常小甚至毫无利润可言，出口销售也无法替生产商解决企业亏本的难题。