Thanks for sharing the NG chart. Happy Thanksgiving.

来源: 于 2014-11-25 06:38:32 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

Thanks for sharing the NG chart. I have not figured out how to read it. What do "o" and "x" mean in the grid?

Happy Thanksgiving to you.