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发明名称
Shell
摘要
申请公布号
US2172800(A)
申请公布日期
1939.09.12
申请号
US19370120658
申请日期
1937.01.15
申请人
MANVILLE MANUFACTURING CORPORATION
发明人
MANVILLE CHARLES J.
分类号
F42B12/50
主分类号
F42B12/50
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代理人
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