| 摘要 |
An emitter unit comprises a pair of casing components and a coupling for coupling said components together via an interposed strip that extends beyond the components on all sides and is adapted to form a closed conduit such that one component is inside the conduit and one is outside. At least one of the components defines, together with the interposed strip, a flow restricting flowpath. Apertures are provided for effecting communication between said flowpath and the other component via said strip.
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