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发明名称
METERED SUPPLY OF PRESSURE FLUID FOR LONGWALL ADVANCE SYSTEM
摘要
申请公布号
US3531162(A)
申请公布日期
1970.09.29
申请号
USD3531162
申请日期
1968.10.25
申请人
GULLICK LTD.
发明人
JOSEPH ASHURST
分类号
E21D23/16;E21C35/14;E21C35/16;E21D23/00;E21D23/14;E21D23/26;(IPC1-7):E21C35/14
主分类号
E21D23/16
代理机构
代理人
主权项
地址
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