| 摘要 |
Disassemblable device provided for inserting a device between the opposite ends of two pipes comprising two flanges which can be sealingly fixed to the said ends, wherein it also comprises an extensible member constituting a unitary assembly, which can be mounted in retracted manner between the flanges and then extended so as to sealingly bear against the latter, said extensible member being traversed by a passage which is substantially aligned with the axis of the pipes, when it sealingly bears against the flanges.
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