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发明名称
ELECTRO ACOUSTIC TRANSDUCER
摘要
申请公布号
CA654496(A)
申请公布日期
1962.12.25
申请号
CAD654496
申请日期
申请人
HUGH S. KNOWLES
发明人
HUGH S. KNOWLES
分类号
主分类号
代理机构
代理人
主权项
地址
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Amines catalysis.
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