As the interface between the border of Thailand, Laos and Cambodia has an area of about 12 square kilometers. For the section area in Thailand is the area of Phu kradueng National Park, the อำเภอนา จะหลวย in Ubon Ratchathani province.แขวงจำปาสัก section area in Cambodia is Preah Vihear province
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emerald named imitate the triangle, which is at the interface of Thai, Lao, และพม่า in the North
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