METHOD OF DRIVING A GANGWAY OF CIRCULAR CROSS-SECTION AND APPARATUS THEREFOR,申请号PL19830241799-传众专利搜索

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发明名称	METHOD OF DRIVING A GANGWAY OF CIRCULAR CROSS-SECTION AND APPARATUS THEREFOR
摘要
申请公布号	PL137433(B1)	申请公布日期	1986.05.31
申请号	PL19830241799	申请日期	1983.05.03
申请人		发明人
分类号	E21C;E21D;E21D9/10;(IPC1-7):E21D9/10	主分类号	E21C
代理机构		代理人
主权项
地址

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