Invite employees to dress PTTES purple shirt with logo job honor King suda Rattana Thep rat-throughout the month. Apr 2558 (2015) or formal and appropriate.
Invite employees PTTES dress with purple trim and logo in honor of HRH Princess Maha Chakri Sirindhorn's performance in April 2558 or at leisure, and fitness.
Invite the staff PTTES dress with purple shirt with the logo commemoration of HRH Princess Sirindhorn. Throughout the month of April 2558 or informal and suitability.