| 摘要 |
<p>A gas heater (16) includes a chamber (22) having a displaced inlet and outlet (24, 26), a heater element (28) and a control system (29) for controlling the heating effect applied to any gas passing therethrough so as to maintain the temperature of the gas supplied for 'curing' a sand mould/core within a temperature range more narrow than previously possible. <IMAGE></p> |
