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发明名称
CHANNELING APPARATUS AND METHOD
摘要
申请公布号
US3596995(A)
申请公布日期
1971.08.03
申请号
USD3596995
申请日期
1968.05.03
申请人
BROWNING ENGINEERING CORP.
发明人
ERNEST MARSHALL FITZGERALD
分类号
E21C37/16;(IPC1-7):E21C37/06
主分类号
E21C37/16
代理机构
代理人
主权项
地址
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