The attenuation device comprises a plastic module comprising an inlet pipe (10.1) connected to a first end (20.1) of a cavity. The second end of the cavity (20.2) is connected to an outlet pipe (11.2). The inlet and outlet pipes extend inside the cavity by...

The shutter system consists of a series of shutters (20a) controlling the flow of a fluid through ducts, each of which has a cavity (1010a - d)to receive the shutter in the open position so that it does not obstruct the flow. The shutters are operated elec...