| 摘要 |
A flow control device ( 1 ) for fluids in which a duct ( 2 ) has a predetermined inner port ( 4 a) controlled by a moving shutter member ( 3 ) and is provided, on each side of the moving shutter member ( 3 ), with a fixed shutter member ( 18 ) having a predetermined shape and adapted to cooperate with the moving shutter member ( 3 ) to define a hydraulic resistance varying according to a predetermined law which is a function of the shape of the fixed shutter member ( 18 ).
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