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发明名称
摘要
申请公布号
JPS586830(U)
申请公布日期
1983.01.17
申请号
JP19810099569U
申请日期
1981.07.03
申请人
发明人
分类号
E02B7/54;E02B7/30;(IPC1-7):E02B7/30
主分类号
E02B7/54
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