| 摘要 |
In a domestic gas-fired oven of the pyrolytic self-cleaning type with a forced-draught fan re-circulating a portion of the combustion products back through the oven during self-cleaning the re-circulation ratio, that is to say, the ratio of the total mass circulating to the net mass entering and leaving the system, is between three to one and five to one, being preferably four to one.
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