| 摘要 |
<p>A drainmast (30) including an electronic temperature detecting and control circuit (6) contained in a fairing (2) detects the temperature of a drain tube (3) and the electronic temperature detecting and control circuit selectively applies voltage to one or more heating elements in accordance with the detected temperature. The applied voltagemay be unequally applied to the heating elements. The electronic temperature detecting and control circuit only requires two leads, one (5a) for ground and one for the supplied voltage (5b). The drainmast is reliable, has a long life span and rapidly responds to temperature changes.</p> |
