End-to-end encryption and privacy controls.
Message and call for free* around the world.
Group conversations made simple.
Say it with stickers, voice, GIFs and more.
Reach your customers from anywhere.
http://okay.farafile.ir/file/47183/جزوه-دستنویس-ترمودینامیک-2-دکتر-جان-نثاری-(پردیس-فنی-شهید-بهشتی)