1 / 2 IR.022/2017 13 November 2017 Re: Clarification on the changes of Profit and Loss Statement To President The Stock Exchange of Thailand T Engineering Corporation Public Company Limited (the

Ref. No. 111/2562 August 14, 2019 SUBJECT : Management Discussion and Analysis ending June 30, 2019 ATTN : The President Stock Exchange of Thailand The Company would like to clarify the operation

1 / 4 No.IR.002/2018 22 February 2018 Re: Notification of the changes of the Profit and Loss Statement To: President Stock Exchange of Thailand We, T Engineering Corporation Public Company Limited

- Translation – Ref. EIC-AD026/2018 August 10, 2018 Subject Management Discussion and Analysis for the Six-Month Period Performance Ending June 30, 2018 To President The Stock Exchange of Thailand The Board of

จดหมายชี้แจงQ160e May 15, 2017 The Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis for three month Ending 31 March 2017 Summary of the 1 st Quarter

จดหมายชี้แจงQ161e May 14, 2018 The Managing Director The Stock Exchange of Thailand Subject : Management Discussion and Analysis for three month Ending 31 March 2018 Summary of the 1 st Quarter

Feb 23, 2018 Subject: Management Discussion and Analysis for Year Ended December 31, 2017 To: Listing Department, Stock Exchange of Thailand Patkol Public Company Limited : Management Discussion and

จดหมายชี้แจงq363e November 13, 2020 Managing Director Stock Exchange of Thailand Subject : Management Discussion and Analysis for three month Ending 30 September 2020 Summary onThird Quarter result

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(Translation) No. MD119/2560 August 29, 2017 Re: Clarification on the Financial Performance of the Company and its subsidiaries as of Year 2015 Attn: President The Stock Exchange of Thailand We, K. C