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发明名称
摘要
申请公布号
JPS5457823(U)
申请公布日期
1979.04.21
申请号
JP19770132157U
申请日期
1977.09.30
申请人
发明人
分类号
E04F13/21;E04B9/24;E04F13/08;(IPC1-7):E04F13/08;E04B5/57
主分类号
E04F13/21
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