| 摘要 |
<p>558,249. Heating air. CRUISE, A. J. Aug. 29,1942, No. 12186. [Class 64 (i)] Air forced downwardly by a fan 8 through a casing 5 enclosing a combustion chamber 3 is heated by direct contact with the hot gases discharged from the combustion chamber through downwardly directed 'tubes or ducts 4.</p> |
