| 摘要 |
<p>Apparatus for selectively introducing an additive into a conduit fluid stream, said apparatus comprising an intake means (29A) for drawing said additive from a supply thereof, a metering device (28) for selectively regulating the amount of said additive introduced and a clamp (20) which in use engages a conduit (21) and includes means (36) for dispensing said additive through said conduit wall and into the fluid stream.</p> |
