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://slidesaaz.farafile.ir/file/33431/درسنامه-و-نمونه-سئوال-نهایی-و-تستی-درس-شیمی-(3)-فصل-اول