| 摘要 |
<p>The inlet nozzle suitable for swimming pools is constructed as a two-piece-spherical body. This is pivotally graduated on a seating ring and equipped with a continuous bore. One part of the spherical body is, with respect to the other, rotatable about the one axis which runs eccentrically with respect to the axis of the bore. Thereby the cross-section of the bore can be changed at the transition point between both bore sections by turning of the one part of the spherical body. Between the two parts is a gap through which air from the air pipe is introduced.</p> |
