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Heliograph
01
гелиограф
a device used for signaling over long distances using sunlight and a mirror, in which the mirror is used to reflect sunlight in a coded pattern to convey messages
to heliograph
01
гелиографировать, сигнализировать с помощью гелиографа
signal by means of a mirror and the using the sun's rays
heliograph
n
