| 摘要 |
<p>The ceiling boom (1) comprises a holder (3) that rotatably mounts a rotary tube (4). The holder has a bore for flow of pressurized liquid or foam. The end of the bore is formed with a connecting opening for receiving a connector to initiate the liquid flow. Other end of the bore is formed with an opening for receiving a rotary joint for connecting the rotary tube controlled high or low pressure line (5). The rotary tube is a concave or convex shaped hollow rod. An independent claim is included for arrangement of ceiling booms.</p> |
