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发明名称
Improvements relating to pressure-sealed conveyors for powdered material
摘要
申请公布号
GB660518(A)
申请公布日期
1951.11.07
申请号
GB19490021861
申请日期
1949.08.23
申请人
HENRY WALDEMAR HAPMAN
发明人
分类号
B65G53/44
主分类号
B65G53/44
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代理人
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