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://ahmz.farafile.ir/file/43281/جزوه-نظارت-و-نکات-اجرایی-فاضلاب-و-آب-باران