| 单词 | Hardgrove grindability index | 
| 释义 | Hardgrove grindability index [`här´grōv ´grīn·dǝ`bil·ǝd·ē ´in´deks]  ENGINEERING The relative grindability of ores and minerals in comparison with standard coal, chosen as 100 grindability, as determined by a miniature ball-ring pulverizer. Also known as Hardgrove number.  | 
	
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