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发明名称
摘要
申请公布号
JPS6449530(U)
申请公布日期
1989.03.28
申请号
JP19870144560U
申请日期
1987.09.22
申请人
发明人
分类号
E04F21/165;E04G23/02;(IPC1-7):E04F21/165
主分类号
E04F21/165
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代理人
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