| 摘要 |
The nozzle has a channel ( 24 ) in which a cleaning solution is injected under pressure, and an outlet ( 26 ) through which the solution is sprayed against a cylinder. The outlet ( 26 ) is formed by a first part ( 23 ) and a second part ( 25 ), said second part ( 25 ) being movable with respect to said first part ( 23 ) in order to vary the size of said outlet ( 26 ).
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