| 摘要 |
The distance between the downstream end (12) of a differential piston (8) which slides inside a cage (2) and the upstream edge (13) of a feed channel (6) of a spray jet (7) is kept sufficiently large to allow a turbulent flow, created by the piston (8), to agglomerate and form a laminar flow before reaching the upstream edge (13) of a feed channel (6). <IMAGE>
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