CONFERENCE CIRCUIT FOR SWITCHING TELEPHONE EXCHANGES OF NUMERICAL TYPE

• 1. 模拟用户线连接到数字时分复用电话交换台的用户连接电路 [P] . 中国专利： CN1150743C . 2004.05.19
• 2. 程控数字电话交换机用户电路板故障检测与诊断系统 [P] . 中国专利： CN1132993A . 1996-10-09
• 3. CONFERENCE CIRCUIT FOR SWITCHING TELEPHONE EXCHANGES OF NUMERICAL TYPE [P] . PT74762B . 1983-11-30

  机译： 交换数字类型电话交换的会议电路

• 4. CIRCUIT FOR A CONFERENCE CONNECTION FOR TELEPHONE COMMUTATION EXCHANGES OF NUMERICAL TYPE [P] . YU80382A . 1985-03-20

  机译： 数值型电话换向会议连接的电路

• 5. CONFERENCE CIRCUIT FOR TELEPHONE EXCHANGES OF THE NUMERICAL TYPE [P] . AU1636576A . 1978-02-02

  机译： 数值型电话交换会议电路

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• 7. Two Switches Flyback Type Soft-Switching DC-DC Converter using Snubber Energy Regenerative Circuits with Auxiliary Transformers [O] . Yoshihiro Konishi, Mutsuo Nakaoka 2000

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