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发明名称
SWINGING DOOR OPERATOR
摘要
申请公布号
CA385179(A)
申请公布日期
1939.11.21
申请号
CAD385179
申请日期
申请人
DUNCAN J. STEWART
发明人
DUNCAN J. STEWART
分类号
主分类号
代理机构
代理人
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