| 摘要 |
<p>A hollow disc for use in a heat exchanger comprises a pair of plates (1) connected at their outer periphery (2) and spaced apart adjacent their centres (3). Each plate (1) is corrugated annularly with at least one corrugation (5). The two plates are held together intermediately by means of a single ring of stay bolts (6) affixed to and between the plates.</p> |
