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发明名称
摘要
申请公布号
JPS5215058(Y1)
申请公布日期
1977.04.05
申请号
JP19690068944U
申请日期
1969.07.18
申请人
发明人
分类号
E04F21/16;B21D39/00;F16B15/06;(IPC1-7):E04F21/16
主分类号
E04F21/16
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