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发明名称
摘要
申请公布号
JPS559979(B2)
申请公布日期
1980.03.13
申请号
JP19750039522
申请日期
1975.03.31
申请人
发明人
分类号
E01D1/00;E01D101/00;E02D27/00;E02D31/08;E04B1/98
主分类号
E01D1/00
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