In the light of analogue test in laboratory, the stability of roof of fully mechanized working face with top coal caving is studied during withdrawing support at stop line.
通过实验室相似模拟试验，对综放面收尾撤架空间的顶板稳定性进行了研究。
The set-top box also converts the digital signal to an analogue signal so an older television can display the programs.
机顶盒也把数字信号转换为模拟信号，所以一个旧电视可以显示程序。
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