{HEAD ~ The apparatus} for reducing {TAIL ~ nitrogen oxide} 1, wherein the exhaust pipe, the mixer, the inlet portion of the de nitrification catalyst reaction device, and the de nitrification catalyst reaction device are disposed coaxially to each other 
for reducing
{ HEAD ~ The apparatus } for reducing { TAIL ~ nitrogen oxide } 1 , wherein the exhaust pipe , the mixer , the inlet portion of the de nitrification catalyst reaction device , and the de nitrification catalyst reaction device are disposed coaxially to each other
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