不能熄灭的工业炉的燃料费用属于（ ）成本。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27080' and id < 2244870 and id<>'2244870' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27080' and id > 2244870 and id<>'2244870' order by id asc limit 5