In the digital circuit, the digital frequency meter belongs to the sequence circuit, it mainly by has the memory function trigger constitution.
在数字电路中，数字频率计属于时序电路，它主要由具有记忆功能的触发器构成。
Applicable to communication audio frequency, broadcast sound system, meter, electric equipment and automatic equipment and anti-interference needed circuit shielded wire and cable.
通讯音频、广播音响系统、仪表、电子设备及自动化设置、需防干扰线路屏蔽电线电缆。
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