The 1990 s began, Iran is not allowed installed satellite TV receiving antenna, later the ban to relax.
上世纪90年代中期开始，伊朗禁止私自安装卫星电视接收天线，后来这一禁令有所放松。
The main parameters of the satellite TV signal receiving antenna positioning are the azimuth, the elevation angle and polarization angle.
卫星电视信号接收天线定位的主要参数是方位角、仰角和极化角。
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