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发明名称
VENTILATING ASSEMBLIES
摘要
申请公布号
CA492193(A)
申请公布日期
1953.04.21
申请号
CAD492193
申请日期
申请人
ALEXANDER WALETZKY
发明人
ALEXANDER WALETZKY
分类号
主分类号
代理机构
代理人
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地址
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