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Data broadcasting is a new television service different from traditional audio and video service.
数据广播是传统声音和视频以外新的电视服务业务。
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The Second is broadcasting for audio and video test.
第二类是广播电视，广泛应用于音视频设备的测试。
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The Second is broadcasting for audio and video test.
第二类是广播电视，广泛应用于音视频设备的测试。
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