| http://www.w3.org/ns/prov#value | - on is composed similarly to the fuel reformer 1A shown in FIG. 1 except that points indicated by a bold line (reforming tube inner cylinder 3, reforming tube inner cylinder upper plate 4, and others, mainly the portion where raw fuel introduced from the raw fuel inlet 6 and steam come into contact with and, at the same time, are heated by the combustion gas) are made of the material according to t
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