Contact us
Choose a category below so we can get back to you as quickly as possible.
79g的鐵球理論體積為79g/7.9g/cm³;=10cm³;,所以空心體積為15-10=5CM³;
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.