| 摘要 |
992,413. Thermal regenerators. JAMES HOWDEN & CO. Ltd. (Air Preheater Corporation). May 16, 1962 [May 25, 1961], No. 18861/61. Drawings to Specification. Heading F4K. A heating-surface element, e.g. for a rotary regenerative air preheater, comprises an undulated metal plate encased in a coating of vitreous-type enamel. The core plate may be of mild steel or a corrosion-resistant low-alloy steel. |
