37161
The combustion unit is equipped with a water-cooled reciprocating grate , a post - combustion chamber , where the selective non-catalytic reduction of the nitrogen oxides is included and a steam boiler with the heat exchangers .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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