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发明名称
Piezoelectric crystal apparatus
摘要
申请公布号
US2079540(A)
申请公布日期
1937.05.04
申请号
US19360098431
申请日期
1936.08.28
申请人
WOLFSKILL JOHN M
发明人
WOLFSKILL JOHN M.
分类号
H03H9/09
主分类号
H03H9/09
代理机构
代理人
主权项
地址
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