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Coal

Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.

Contributors in Coal

Coal

爆破帽

Energy; Coal

包含對熱和休克敏感的起爆裝置。爆破帽用於啟動二次爆炸,這出於安全的原因,是更穩定的但通常更大數量的外延。爆破帽可以是

鑽孔

Energy; Coal

引起鑽進一個大或深洞。

爆破電路

Energy; Coal

用來引爆主炸藥爆破的帽電路。

爆破劑

Energy; Coal

一種材料,對一種燃料和氧化劑。,它通常是不很敏感,並需要助推器爆炸或二次爆炸點燃它。

煙煤

Energy; Coal

軟煤被認為比但最糟糕的褐煤無煙煤比任何時候都更好。水、 空氣、 氫和硫,其餘 約 60-80%碳。

潮濕的黑

Energy; Coal

低氧水準太多氮、 氬、 二氧化碳或水蒸氣的區域時用的詞語。在挖掘,這將創建窒息常見致命情況。

粘土靜脈

Energy; Coal

粘土或像粘土,填充空心煤礦區的材料。

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