... the larger timber, such as fir, pine, teak, etc. To select the oil and preservative treatment must be done; production process ... temperature of about 70 degrees for more than 15 days. To sterilization disinsected, wood moisture inside drops below 10 degrees, ... enhance core competence, devote our brand "Songsen" and "Soonsun" to be modernized models with management standard, industry leading, and strong ...