There are 6 heating elements (4 on the top and 2 on the bottom)， Among them, 2 of the 4 heating elements on the top are quartz elements.
What kind of heating elements does this use, and how many of them?
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There are 6 heating elements (4 on the top and 2 on the bottom)， Among them, 2 of the 4 heating elements on the top are quartz elements.