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发明名称
Improvements in or relating to worms or impellers of the archimedean type
摘要
申请公布号
GB472254(A)
申请公布日期
1937.09.17
申请号
GB19360007939
申请日期
1936.03.17
申请人
RALPH PLATT BARKER;THOMAS PERCIVAL ELSTON
发明人
分类号
B28B3/22
主分类号
B28B3/22
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