该装置具有音量自动控制、故障自动告警、性能稳定、安全可靠等特点。
The utility model has the characteristics of automatic volume control, automatic accident alarm, stable performance, safety, etc.
该装置具有音量自动控制、故障自动告警、性能稳定、安全可靠等特点。
The utility model has the characteristics of automatic volume control, automatic accident alarm, stable performance, safety, etc.
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