| 摘要 |
<p>According to the invention, there is fitted on the lower portion of the gas conduit (1), at specified and regularly spaced locations, a slide casing (3) comprising a cover (5), there is fixed on the slide casing (3), via quick-operating means, a piercing assembly comprising a trepan, an opening (1a) is pierced in the gas conduit (1), and the piercing operation is repeated at each location where slide casings (3) have been fitted, then a cleaning assembly (30) is fixed on the slide casing (3), likewise via quick-operating means (36), a cleaning system (60) is introduced into the gas conduit (1), and the cleaning operation is performed at each location where slide casings (3) have been fitted on the gas conduit (1) in order to clean the whole of the said conduit of the distribution network. <IMAGE></p> |
