ابحث
Heliograph
01
هليوغراف
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
تحديد باستخدام الهليوغراف, إرسال إشارات باستخدام الهليوغراف
signal by means of a mirror and the using the sun's rays
heliograph
n
