写真素材 - Sunset at Kaengkrachan National Park ,Chaipattana low speed surface aerator to pump oxygen into wastewater designed and developed by his Majesty the King Bhumibol Adulyadej of Thailand.
Sunset at Kaengkrachan National Park ,Chaipattana low speed surface aerator to pump oxygen into wastewater designed and developed by his Majesty the King Bhumibol Adulyadej of Thailand.