| 摘要 |
<p>An energy-saving kitchenware comprises protrusions (2) provided on a bottom surface. The protrusion (2) is cone, pyramid, semicircle, trihedron, tetrahedron, pentahedron, or hexahedron in shape. By providing protrusions (2) on the bottom of a kettle or a pan (1), the contact area between the kettle or pan (1) and flame is extended and the heating time is reduced.</p> |
