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://farafiles.ir/file/27274/تحقیق-نقشه-برداری-(ترازیابی-زاویه-مساحت-چهارضلعی-و-شش-ضلعی)