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.
https://reyhane.pdf-doc.ir/file/17942/آموزش-درس-پیوند-کووالانسی-شیمی-دهم-متوسطه-به-صورت-فایل-انیمیشن