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Upgrading method of low-rank coal
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Patent number 4,559,060
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Issue date Dec 17, 1985
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Hitachi, Ltd.
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Katsumi Muroi
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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Method of upgrading low-rank coal
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Patent number 4,511,363
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Issue date Apr 16, 1985
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Hitachi, Ltd.
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Yoichi Nakamura
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...