million or 17.37% from the same period of previous year. This was due to decrease in the delivery of pre-stressed concrete piles and post-tensioned. However, the delivery of glass-fiber reinforced concrete

13.58% from the same period of previous year. This was due to decrease in the delivery of pre-stressed concrete piles, post-tensioned and special cement which was Baht 101.24 million. However, the

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delivery volume of pre-stressed concrete piles, fiberglass reinforced concrete and post-tensioned. (2) Cost of sales In 2017, the Company and its subsidiaries had total cost of sales at the amount of Baht

: Clause 1. The following Notifications shall be repealed: (1) Notification of the Securities and Exchange Commission Re: Requirements relating to Accounting of Securities Company dated 18 May 1992; (2

Baht 659. 92 million, which increased from the same period of previous year by Baht 224. 75 million or 51.65%. The increase was affected by an increase in the delivery volume of pre-stressed concrete

AQIs ) 1 % 2564 2563 1 (Leadership Responsibilities for Quality within the Firm) ( ) (1) 2 (Relevant Ethical Requirements) ( ) (3) 3 (Acceptance and Continuance of Client Relationships and Specific

2562 1 (Leadership Responsibilities for Quality within the Firm) ( ) (2) 2 (Relevant Ethical Requirements) ( ) ( ) 3 (Acceptance and Continuance of Client Relationships and Specific Engagements) (1) (3

Responsibilities for Quality within the Firm) ( ) (1) 2 (Relevant Ethical Requirements) ( ) (2) 3 (Acceptance and Continuance of Client Relationships and Specific Engagements) (1) (1) 4 (Human Resources) ( ) ( ) 5

and perform the auditing to provide opinion on the financial statements in compliance with the requirements of the law relating to auditors and additional requirements as specified in the notification