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发明名称
Plow-type cutter conveyor combination having slack coal clearing means
摘要
申请公布号
US2786662(A)
申请公布日期
1957.03.26
申请号
US19540442847
申请日期
1954.07.12
申请人
STAMICARBON N. V.
发明人
KRAPELS JOHANNES G.
分类号
E21C35/20
主分类号
E21C35/20
代理机构
代理人
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地址
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