| 摘要 |
<p>498,240. Aerating liquids. HARTLEY, C. J. July 13, 1937, No. 19347. [Class 14 (i)] [Also in Group I] A diffuser for blowing air or other gas into sewage or other liquids comprises a plurality of unframed circular, reversible, porous tiles c held down on annular nuts b on an underframe a each by means of a single stud, bolt, set-screw, or the like e passed through a hole in the centre of the tile. The gas enters through an inlet j. Specification 397,841 is referred to.</p> |
