... size 0.5, 0.6, 0.8 high quality wearability and impact Changzhou Xili Alloy Tools Co., Ltd. is a joint ... venture of Jiangxi Golden Dragon Mining Co., Ltd. Of Jiangxi, and the United States K Engineering Co., Ltd., It's from ... tungsten metal powder, 2, 000 tons of tungsten carbide powder, and 1, 500 tons of mixture. It's a science ...