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expansion since the last quarter of 2016. However, gross profit margin for Q3 2017 was slightly decreased from the same period of 2016, because service cost for engineer and depreciation has been increased. 4
. Nevertheless, the Group has expanded testing and inspection service in eastern region since the last quarter of 2016. Gross profit margin for the year rather decreased because service cost for engineer and
last quarter of 2016. However, service cost for engineer and depreciation has been increased. Revenue from testing and inspection service in eastern region was 38.55% of revenue from testing and
testing and inspection service in eastern region amounting of 3.87 Million Baht as the Group has expanded the market since the last quarter of 2016. However, service cost for engineer and depreciation has