| 摘要 |
A gas burner having at least one continuous annular gas delivery nozzle in a top plate of its head. The top plate forms part of a cap-like upper member supported by a dish-like base member, the two forming between them a gas chamber. The gas chamber accommodates at least one insert plate which has a boss extending upwards into an opening of the top plate to form with the rim of the opening or with the annular boss of another insert plate an annular gas delivery nozzle.
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