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Major features in the Kamphaeng Phet Historical Park include archaeological remains of ancient sites such as Mueang Chakangrao to the east of the Ping River , Mueang Nakhon Chum to the west and Mueang Trai Trueng some 18 km from the town to the southwest .
 Kamphaeng Phet
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Answer:
 Kamphaeng Phet