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发明名称
摘要
申请公布号
JPS521124(Y2)
申请公布日期
1977.01.12
申请号
JP19710069484U
申请日期
1971.08.04
申请人
发明人
分类号
E02F3/815;E02F3/76;E02F3/80;(IPC1-7):E02F3/76
主分类号
E02F3/815
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