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://nasimeh.farafile.ir/file/31104/پاورپوینت-آزمون-های-کنترل-کیفی-دستگاههای-رادیوگرافی-دیجیتال