| http://www.w3.org/ns/prov#value | - n line such as combustion gas pipe 14, reforming tube outer cylinder 2, combustion exhaust pipe 13, reforming tube outer cylinder upper plate 5, or others composing the fuel reformer 1B are made of an ordinary steel, and points indicated by a bold line in FIG. 2 (catalyst tube 10, reforming tube inner cylinder 3, reforming tube inner cylinder upper plate 4, and others, mainly the portion where raw
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