| 摘要 |
In accordance with certain embodiments, a system includes' a spray device (12) having a liquid pathway leading to a liquid exit (416), an air pathway leading to an air exit (414, 418, 420, 422) directed toward a spray region downstream of the liquid exit (416), and an assembly (400) disposed in the l iquid pathway adjacent the liquid exit (416). The assembly (400) includes a threadless pintle (502) generally fit into a sleeve (500) in a concentric ma nner without threads. The assembly (400) also includes a generally annular p assage (520) between the threadless pintle (502) and the sleeve (500) and a passage coupled with the generally annular passage (520). The generally annu lar passage (520) also has a cross-sectional area that alternatingly increas es (584) and decreases (586) in a lengthwise direction along the liquid path way.
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