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https://dronpro.cz/nova-pravidla-pro-letani-s-drony-2020-vse-o-registraci-dronu-s-autoritami-civilniho-letectvi?fbclid=IwAR2Qjb5Ckd0TnEBVynNQXJtyv__ohLMRaM4IuT1Dd6jaBXvuwvWbLkRFQn8