请海游帮我翻译下,先谢了? The HGI indicates the ease of coal grinding and is completely related to physical properties such as hardness, fractrre and tensile strength . it determines the relative grindability or ease of pulverizing coal in comparison with an arbitrary standard ,chosen as 100 grindability . the lower the HGI, the more difficult the coal is to grind. 查看更多4个回答 . 1人已关注