The method has been applied in mechanical scanning antenna servo system.
该方法在机械扫描天线伺服系统中得到了一定的应用。
Paul Nipkow obtains a patent in Germany for TV, using a selenium cell and a mechanical scanning disk.
保罗·尼普可夫获得德国电视发明专利。他在电视技术中采用硒光电管和机械扫描盘。
But as the mechanical scanning system was working, some scanning light lines were appeared on the TV picture.
在实际的机械扫描运行过程中，电视图像出现了回扫亮线。
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