#heliograph



English

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    • an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on
    • Pos: noun
    • signal by means of a mirror and the using the sun's rays
    • Pos: verb

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فارسی

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    • افتاب نگار
    • گراورسازى بانور افتاب
    • دستگاه عکسبردارى از افتاب
    • مخابره بوسيله نور خورشيد

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