The interview. The collected data the population studied. By randomly based on features defined in the topic selection of samples. The author collected data for interview, and the innovation KKU Roller Walker.10 by trial for about different 30 minutes. The study and the 4 - 10 November 2558 from time to time 08.30 pm to 16.00.
.
การแปล กรุณารอสักครู่..