| 摘要 |
Device for injecting gas into a container or a pipe (1) for a liquid containing impurities or foreign bodies, such as purification troughs, sewer pipes (ducts) or the like, comprising a hollow body (2) connected to the said container or pipe, the cavity of this body opening into the latter (1) and comprising valves (17) and gas-injection means (15) connected to a pipe supplying the said gas, the said injectors (15) being removably connected to this body (2) and the said valves (17) closing up when these injection means (15) separate from the said body (2). <IMAGE>
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