| 摘要 |
<p>The saucepan (1) is made of stainless steel, and under its base there is an intermediate disc (4), made of soft iron. This is surrounded by a ring (3) of non-magnetic material, which is pref. copper. The disc is pressed into the ring before it is fixed to an outer disc (5). The outer disc, made of stainless steel, is bonded under the intermediate disc so that this is entirely sealed from the ambient atmos.. Both discs are then bonded to the base of the saucepan.</p> |
