-68.42% Operating results for each business segment are shown below: 1. Manufacturing and Selling of Special Cutting Tools unit: THB million 2019 2018 Change (THB million) Change (%) Revenue from External
) 0.00 (25.12) (10.35) (1,675.52) 0.00 (1,675.52) Allowance for devaluation of inventories (38.50) 0.00 35.15 0.00 (3.35) (3.35) Gross profit (loss) by segment 142.36 0.00 26.25 (5.47) 163.14 1.55 164.69
) (7.10) (1,001.88) 0.00 (1,001.88) Allowance for devaluation of inventories 39.95 0.00 4.20 0.00 44.15 44.15 Gross profit (loss) by segment 78.99 0.00 7.09 (2.20) 83.88 1.48 85.36 Segment income (%) 95.26
(948.15) 0.00 (948.15) Allowance for devaluation of inventories 2.55 0.00 0.00 0.00 2.55 2.55 Gross profit (loss) by segment 79.15 0.00 5.48 0.00 84.63 1.06 85.69 Segment income (%) 96.64 0.00 3.25 0.00
services (4,799.36) 0.00 (128.82) (17.44) (4,945.62) 0.00 (4,945.62) Allowance for devaluation of inventories 4.00 0.00 40.00 0.00 44.00 44.00 Gross profit (loss) by segment 568.22 0.00 51.90 (7.66) 612.46
(1,319.00) 0.00 (1,319.00) 0.00 (1,319.00) Allowance for devaluation of inventories 0.00 0.00 0.00 0.00 Gross profit (loss) by segment 136.25 0.00 136.25 0.93 137.18 Segment income (%) 99.94 0.00 99.94 0.06
services (1,283.14) 0.00 (1,283.14) 0.00 (1,283.14) Allowance for devaluation of inventories 0.00 0.00 0.00 0.00 Gross profit (loss) by segment 121.16 0.00 121.16 1.40 122.56 Segment income (%) 99.90 0.00
re-opening the telecom shops in malls. Meanwhile, price competition remained fluid as operators continued offering low-end unlimited data plans in prepaid segment. Despite these challenges, we
41.24% Operating results for each business segment are shown below: 1. Manufacturing and Selling of Special Cutting Tools unit: THB million 2020 2019 Change (THB million) Change (%) Revenue from External