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发明名称
摘要
申请公布号
JPS4730643(U)
申请公布日期
1972.12.07
申请号
JP19710032472U
申请日期
1971.04.24
申请人
发明人
分类号
E02B7/22;(IPC1-7):E02B7/22
主分类号
E02B7/22
代理机构
代理人
主权项
地址
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