Contact us
Choose a category below so we can get back to you as quickly as possible.
1.2,0.9,1.5,세 개의 수 와(2)는 비례 를 구성 할 수 있다. 1.2:0.9=2:1.5
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.