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1)
#29,255
Common
Meaning
    1. EN Coal (Old English col; meaning "mineral of fossilized carbon" since the thirteenth century) is a combustible black or brownish-black sedimentary rock usually...
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11)
#264,290
りょ しょ
Meaning
    1. coal-fired power plant
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14)
#331,983
Meaning
    1. coal liquefaction
    1. EN Coal liquefaction is a process of converting coal into liquid hydrocarbons: liquid fuels and petrochemicals.
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