| 摘要 |
<p>An inductor for drawing one fluid into another (e.g. air into fish-pond water) comprises an insert (12) located in a duct (10) to define narrowing (15, 16) and widening (19, 20) passages on either side. The first fluid flows along theses passages and draws the second fluid into it via egress holes (24). A valve (25) can be moved in the duct to vary the size of the narrowing passages (15, 16).</p> |
