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发明名称
摘要
申请公布号
JPS5554402(U)
申请公布日期
1980.04.12
申请号
JP19780134115U
申请日期
1978.10.02
申请人
发明人
分类号
E01B9/68;(IPC1-7):E01B9/68
主分类号
E01B9/68
代理机构
代理人
主权项
地址
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