1 August 17, 2018 Subject: Notification of the Resolutions of the Board of Directors’ Meeting and Determination of the Date of Extraordinary General Meeting of Shareholders No. 1/2018 To: President
assets and convening the Extraordinary General Meeting of the Shareholders No. 1/2018 (Revise 3) To : President, The Stock Exchange of Thailand Attachment : 1. Capital Increase Report Form (F 53-4) 2
, Bangkok 10900, Thailand Fax : (662) 936-1669 ทะเบียนเลขท่ี 0107554000097 Registration No. 0107554000097 HYDROTEK PUBLIC COMPANY LIMITED บริษทั ไฮโดรเท็ค จ ำกดั (Translation) No. 031/0461 April 12, 2018
, Bangkok 10900, Thailand Fax : (662) 936-1669 ทะเบียนเลขท่ี 0107554000097 Registration No. 0107554000097 HYDROTEK PUBLIC COMPANY LIMITED บริษทั ไฮโดรเท็ค จ ำกดั (Translation) No. 037/0561 May 8, 2018 Subject
right of the employees authorized to operate in the teleworking site; 14 (7) protection against malware. Provisions in the Notification No. Sor Thor. 37/2559 Clause 8 An intermediary shall establish a
right of the employees authorized to operate in the teleworking site; (7) protection against malware. Provisions in the Notification No. Sor Thor. 37/2559 Clause 8 An intermediary shall establish a
liable for any loss or damages arising from or related to its use. ------------------------------- Notification of the Office of the Securities and Exchange Commission No. SorKhor. 49/2552 Re: Approval for
damages arising from or related to its use. ------------------------------- Notification of the Office of the Securities and Exchange Commission No. SorKhor. 49/2552 Re: Approval for Investor Contacts and
ด4 UNOFFICIAL TRANSLATION Codified up to No. 2 As of 20 February 2017 Readers should be aware that only the original Thai text has legal force, and that this English translation is strictly for