heliograph
An apparatus for signalling by means of a moveable mirror which reflects flashes of sunlight. / A heliogram. / An instrument for measuring the intensity of sunlight. / A device for photographing the sun.
Not disordered.
Any diatom of the class Bacillariophyceae
(chemistry) reaction to form a ditriflate
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DiQt（ディクト）
無料
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