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Heliograph
01
हेलियोग्राफ
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
हेलियोग्राफ करना, सूर्य के किरणों द्वारा संकेत करना
signal by means of a mirror and the using the sun's rays
heliograph
n
