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://efile.farafile.ir/file/34873/جزوه-آموزشی-اصول-عیب-یابی-مکانیکال-سیل-ها-شرکت-ملی-نفت-ایران