Cari
Heliograph
01
heliograf, alat sinyal menggunakan sinar matahari
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
memberi isyarat dengan cermin dan sinar matahari, menggunakan heliograf
signal by means of a mirror and the using the sun's rays
