s3-ap-southeast-1.amazonaws.com · + Chùm tia phån xa hôi tu thì ånh thât.( ånh truóc güöng). + Chùm tia phån phân kÿ thì ånh åo.( ånh sau güöng). Chú ý: Ðôi
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.