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://file30t.farafile.ir/file/32667/جزوه-تحلیل-سازه-1--دکتر-تابش-پور--دانشگاه-صنعتی-شریف