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://interfile.ir/file/32471/پاورپوینت-مقایسه-برآورد-میزان-فرسایش-و-رسوب-زایی-در-زیرحوضه-سزار