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发明名称
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摘要
申请公布号
GB922627(A)
申请公布日期
1963.04.03
申请号
GB19590042866
申请日期
1959.12.16
申请人
DOCUMENTATION LIMITED
发明人
分类号
B42F13/12
主分类号
B42F13/12
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代理人
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