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发明名称
METHOD AND APPARATUS FOR GAS FILLING AND TIPPING OFF ENVELOPES
摘要
申请公布号
CA443215(A)
申请公布日期
1947.07.29
申请号
CAD443215
申请日期
申请人
CANADIAN GENERAL ELECTRIC COMPANY
发明人
WALTER J. GEIGER;REGINALD J. AYRES
分类号
主分类号
代理机构
代理人
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