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black and white television
释义
black and white television
Encyclopedia
工学
【模拟电视】
释
black and white television
黑白电视
将活动图像的亮度和声音信息变换成电信号,通过无线电波等传输媒介从一点传播出去,供多点即时重现活动图像和声音的系统。
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