20.200MHZ 20.2010-21,22,23,24,25 20.2020-21,22,23,24,25 20.2040-21,22,23,24,25 20.21.8.008.0000 20.21.8.008.4000 20.21.8.012.0000 20.21.8.012.4000 20.21.8.024.0000 20.21.8.024.4000