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://123dok.co/document/yd7xpedl-일차방정식의-그래프에-대한-설명으로-옳은-것은-축의-방정식은.html