Research on alternative energy today based on issues of global warming and greenhouse effects. The use of coal briquettes from low-calorie coal derived from mines in the province of South Sumatera originally destined for the food industry is less desirable because it emits black and smelly smoke. is difficult to turn on. and it is difficult to shut down quickly. https://halohealthcarers.shop/product-category/womens-compression-socks-stocking/
STUDY OF BIO-COAL BRIQUETTE AS SOLID FUEL FOR ALUMINUM SMELTER
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