| 摘要 |
999,668. Rotary heat exchangers. I. LAING. Jan. 15, 1962 [April 1, 1961], No. 1487/62. Heading F4S. The subject-matter of this Specification is described in Specification 999,666, with reference to Figs. 6, 7, 11, 12 and 14 of that Specification, but the claims differ. The Specification also includes a further embodiment as shown, wherein adjacent fan blades 10 and 12 are connected by tubes 16. Specifications 886,376, 999,667 and 999,669 also are referred to.
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