• To eliminate the dust in the offices on the second floor are still ongoing operations by providing the recipient maoborikan to change a small filter to trap dust, once a month.
• Removal of dust in a second-floor office. Continue to perform consistently. By providing contractor services to small change filters to trap dust once a month.
Industrial dust removing in the office on the second floor. Also operated continuously. By providing the service contractor into a special filter to trap small dust ละครั months time.