| 摘要 |
The head comprises, in a case 1, an inner compartment 2 for housing, behind a window 4, an exploratory video camera tube, and a secondary compartment 15 communicating with a pressurised fluid source and having a distribution chamber leading to a ring of spray nozzles 18 used for propulsion and cleaning. The head of the invention is very suitable for cleaning out main drains. <IMAGE>
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