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://civils.farafile.ir/file/44228/پاورپوینت-کمپوست-و-روش-های-تولید-و-کاربرد-صنعتی-آن-و-مقالات