| 摘要 |
<p>The nozzle has one duct articulated on a soleplate (11) along one articulation axis and another duct (30) articulated on the duct (31) along another articulation axis. Wheels projecting with respect to the soleplate are mounted along the later articulation axis. Articulation points of the tube (30) are located between the soleplate and a top covering the soleplate. The soleplate has openings for passage of the wheels.</p> |
