Italian Thai Development Public Co.,Ltd.
Nawarat Patanakarn Public Co.,Ltd.
A.S. Associate Engineering (1964) Co.,Ltd.
Thai Kajima Co.,Ltd.
Thai Nishimasu Construction Co.,Ltd.
Vichiphan Group
Thai Obayashi Corp.,Ltd.
Thaiwat Engineering Co.,Ltd.
Thai Takenaka International Co.,Ltd.
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| Public Department |
Ministry of Transport and Communications Department of Highways.
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National Park Wildlife and Plant Conservation Department.
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