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发明名称
摘要
申请公布号
JPS536777(B2)
申请公布日期
1978.03.11
申请号
JP19720059209
申请日期
1972.06.14
申请人
发明人
分类号
E21D9/04;E01D2/00;E01D21/00
主分类号
E21D9/04
代理机构
代理人
主权项
地址
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