4.Learn the concepts in problem solving (in the message operation could not be performed because the study courses, there IS limited time for 2 people only do studies, surveys, and build tools (questionnaires) study just in order to have knowledge. Only research rueangkrabuan
การแปล กรุณารอสักครู่..
![](//thimg.ilovetranslation.com/pic/loading_3.gif?v=b9814dd30c1d7c59_8619)