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发明名称
ROCHELLE SALT PIEZOELECTRIC CRYSTAL APPARATUS
摘要
申请公布号
CA420140(A)
申请公布日期
1944.05.09
申请号
CAD420140
申请日期
申请人
BELL TELEPHONE LABORATORIES;WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
WARREN PERRY MASON
分类号
主分类号
代理机构
代理人
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