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发明名称
摘要
申请公布号
JPS50147123(A)
申请公布日期
1975.11.26
申请号
JP19740055636
申请日期
1974.05.20
申请人
发明人
分类号
E04G23/02;E04F13/00
主分类号
E04G23/02
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