| 摘要 |
Apparatus for distributing heat from a heat source relatively evenly over the bottom of a vessel to be heated is disclosed. A first annular element is provided which includes an upwardly concave dish-shaped annulus circumscribing a hollow center. A releasable connecting element of a first type is located on the underside of the first annular element. A second annular element includes an upwardly concave dish-shaped annulus which is larger than the annulus of the first annular element. A releasable connecting element of a second type complementary to the first type is located on the inner periphery of the annulus of the second annular element so that the elements can be locked together for use and disassembled for cleaning.
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