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发明名称
(A) ;Grating construction and assembly method and apparatus
摘要
申请公布号
US4289563(B1)
申请公布日期
1985.09.03
申请号
US19800142335
申请日期
1980.04.21
申请人
发明人
分类号
E04C2/42
主分类号
E04C2/42
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代理人
主权项
地址
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