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发明名称
摘要
申请公布号
JPS4921902(U)
申请公布日期
1974.02.25
申请号
JP19720063474U
申请日期
1972.05.29
申请人
发明人
分类号
E02F9/26;E02F3/36;(IPC1-7):E02F3/36
主分类号
E02F9/26
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代理人
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