Contact us
Choose a category below so we can get back to you as quickly as possible.
r=12.56÷3.14÷2=2(m) (1/3×2×2×3.14×1.5)÷[(2÷2)×3.14] =6.28÷3.14 =2(m) 選我選我!
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.