| 摘要 |
<p>The apparatus has a stationary housing 12, an outer Tee-housing 50 which rotates about a first axis X-X and a nozzle assembly 70 rotatably mounted to the Tee-housing for rotation about a second axis Y-Y. The stationary housing is provided with passageways 18 min for communication with the Tee-housing. The passageways are configured (see Figure 4) so as to provide a substantially constant cross-sectional area to the outlet 68 of the Tee-housing leading to the nozzle assembly 70. <IMAGE></p> |
