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发明名称
Improvements in steel hatch covers
摘要
申请公布号
GB649384(A)
申请公布日期
1951.01.24
申请号
GB19480018088
申请日期
1948.07.06
申请人
ROBERT MACGREGOR;JOSEPH MACGREGOR
发明人
分类号
B63B19/18
主分类号
B63B19/18
代理机构
代理人
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