MULTIPLE-STAGE COAL SEAM FRACING METHOD,申请号GB19870003893-传众专利搜索

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发明名称	MULTIPLE-STAGE COAL SEAM FRACING METHOD
摘要
申请公布号	GB8703893(D0)	申请公布日期	1987.03.25
申请号	GB19870003893	申请日期	1987.02.19
申请人	PERLMAN WILLIAM	发明人
分类号	C09K8/72;E21B43/00;E21B43/26;E21B43/267	主分类号	C09K8/72
代理机构		代理人
主权项
地址

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