May 14, 2007 Subject: Clarification of Change in Operation Results xcess 20% Attention : The President of the Stock Exchange of Thailand Further to the submission of TRT financial statement for the 1st quarter ended 31 March 2007 to Stock Exchange of Thailand on 14 May 2007, the company would like to report the reasons why the company has net loss for the 1st quarter 2007 of 37.66 million Baht which represents more than 20% change compared to the same period last year as follows: 1. Total revenue of 184.41 million Baht, decreased by 95.6 million Baht or 34% due to the postponement of delivery of goods to 2nd quarter as follows: 1 item awaiting for signing agreement with electrical utility, 3 items awaiting for export delivery and 1 awaiting for witness test which their values all together equal to 210 million Baht. 2. Gross profit margin is 8.4% compared to 18.59% the same period last year or decrease by 10.19% as a result of the revenue below the breakeven point of the manufacturing cost. 3. Selling and Administrative Expense is 47.90 million Baht, increased by 2.02 million Baht or 4.40%, which is in line with the normal increasing rate of operation. Please be informed accordingly. (Mr.Upakrom Thaweephoke) Deputy MD (Financial&Marketing)