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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 石炭
Coal
ストリップマイニング(表面)
エネルギー; 石炭
A method used on flatter rain to recover coal by mining long strips successively; the material excavated from the strip being mined is deposited in the strip previously mined.
リード蒸気圧(RVP)]
エネルギー; 石炭
どの石油で液体の蒸発率の間接的な手段です。その絶対蒸気圧力やリード法 (ASTM 法 D 323) によって測定された単一または混在の液体石油製品、原油の。 ...