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Heliograph

Nghe phát âm
( Xem từ này trên từ điển Anh Việt)

Mục lục

Noun

a device for signaling by means of a movable mirror that reflects beams of light, esp. sunlight, to a distance.
Astronomy . photoheliograph.
Meteorology . an instrument for recording the duration and intensity of sunshine.
Photography, Printing . an early type of photoengraving made on a metal plate coated with sensitized asphalt.

Verb (used with object), verb (used without object)

to communicate by heliograph.

Xem thêm các từ khác

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