| 摘要 |
The swivel is secured with a rotary bearing (2) to the ceiling (18) and has a slight bend (5) between two horizontal portions (3,4) of the arm in different planes. The high-pressure hose (7) emerges from the outer end (6) of the lower portion (4) of the arm.The other end of the hose has a rotary joint (8) on the axis of the bearing to which the cleansing liquid is supplied from a high-pressure connection (14). The rigidity of the upper portion (3) of the arm is enhanced by a strut (18), which may extend to the end of the lower portion
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