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发明名称
PIEZO-ELECTRIC DEVICE
摘要
申请公布号
CA307839(A)
申请公布日期
1931.01.20
申请号
CAD307839
申请日期
申请人
CHARLES B. SAWYER
发明人
CHARLES B. SAWYER
分类号
主分类号
代理机构
代理人
主权项
地址
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