| 摘要 |
<p>A carriage for receiving and retaining at least one water delivery nozzle. The carriage comprises a body defining a space which receives and retains therein the at least one water delivery nozzle. The carriage includes support means extending from the carriage body which when the carriage is inserted in a pipe engages an inner surface of the pipe. The carriage further comprises at least one formation which enables the nozzles to be disposed at a predetermined angle relative to the longitudinal axis of the pipe in which the carriage travels.</p> |
