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发明名称
ETCHING PROCESSING METHOD FOR AT-CUT CRYSTAL VIBRATION CHIP AND AT-CUT CRYSTAL VIBRATION CHIP
摘要
申请公布号
JPH0411404(A)
申请公布日期
1992.01.16
申请号
JP19900315473
申请日期
1990.11.20
申请人
SEIKO EPSON CORP
发明人
NAKAMURA HIDEAKI
分类号
H03H9/19;H03H3/02
主分类号
H03H9/19
代理机构
代理人
主权项
地址
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