| 摘要 |
PCT No. PCT/IT96/00003 Sec. 371 Date Jul. 10, 1997 Sec. 102(e) Date Jul. 10, 1997 PCT Filed Jan. 4, 1996 PCT Pub. No. WO96/21513 PCT Pub. Date Jul. 18, 1996A fixed part and a mobile part. The mobile part includes a pipe head offering a curved path with an initial portion that commences axially and is deflected to form a final portion having a certain inclination. The inclined final portion is very short and forms a seat for an interchangeable nozzle selectable from a series of nozzles having tapering through orifices of different inclinations and all connectable to the deflection of the initial portion. Different inclination angles are thus possible.
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