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://faraposhe.farafile.ir/file/26841/اصول-و-مبانی-تصفیه-فاضلاب-و-طراحی-تصفیه-خانه-فاضلاب-شهری