income from complete installation of air tube systems for transfer documents and parcel (Pneumatic Tube Carrier Systems) for projects. . Analysis of Operating Results Statements of Comprehensive Income

-1- AIT (VP-SEC) 022E/2022 August 11, 2022 Subject: Management's Discussion and Analysis of Operating Results for Q2-2022 To: The President of the Stock Exchange of Thailand Summary of Operations Q1

(Translation) Re: BOD.SET 003/2020 February 25, 2020 Subject: Clarification on the Change in operating results for the twelve month ended 31 December 2019 over 20% compared with the same period of

School Name: สารสาสน์วิเทศศึกษา (Translation) Re: BOD.SET 036/2017 November 10, 2017 Subject: Clarification on the Change in operating results for nine month ended September 30, 2017 over 20

(Translation) Re: BOD.SET 011/2019 August 8, 2019 Subject: Clarification on the Change in operating results for the six month ended June 30, 2019 over 20% compared with the same period of the

(Translation) Re: BOD.SET 013/2019 November 12, 2019 Subject: Clarification on the Change in operating results for the nine month ended September 30, 2019 over 20% compared with the same period of

(THAILAND) PUBLIC COMPANY LIMITED Company business operation are engineering, construction,and installation of electrical and control systems. The Company has also been providing operation and maintenance

share) which is accounted for 50.00 percent of registered capital after the capital increase of ERV. ERV plan to invest in Cooling Tower System Installation Project for energy saving. Total project value

Group The Group has principally engaged in distribution of product and equipment, design, assembly and installation, and maintenance service of pure water treatment system; including operate clinical

operating result (%) Y2019 Y2018 %YoY Gross profit margin (%) 43.44% 40.90% 2.54% Selling expenses and administrative expenses to total revenue (%) 44.67% 40.49% 4.18% Net profit margin (%) 0.83% 2.64% -1.81