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发明名称
Procédé de lutte contre la poussière par imprégnation sous pression dans l'extraction du charbon
摘要
申请公布号
FR1366592(A)
申请公布日期
1964.07.10
申请号
FR19630945515
申请日期
1963.08.23
申请人
发明人
LICHTENBERG HUBERT
分类号
E21F5/18
主分类号
E21F5/18
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代理人
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