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2020/07/31
Revision of the page of "Frequency Assignment Plan"
2020/06/03
Revision of the page of "System for the Prevertion of Radio Propagation Blockage"
2020/04/06
Revision of the page of "Frequency Assignment Plan"
2020/04/01
Revision of the page of "Spectrum Charts (as of 1st March 2020)"
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