| 摘要 |
A nozzle comprises a pipe, a head, a threaded pressing element, those are connected to each other in sequence by means of metric threading. Additionally it has a set of replaceable washers with different diameters, those are used in turn and are placed between the threaded pressing element and the head, diaphragm with crescent-shaped slot and openings at the ends, this is pressed to the head by threaded pressing element with replaceable washer, and stopper at the end of the pipe to which the pressure sleeve is connected.
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