| 摘要 |
The mount for a valve element consists of a frame structure (20) which contains a part (22) having a defined shape, a hydraulic jack (52) having a first end piece (54) mounted onto the frame structure (20) and which is mobile between a first position in which the first end piece (54) is placed very near to the part of the frame structure (20) defined shape, and a second position in which the first end piece (54) is extended from the frame structure (20). The valve element (68) consists of a first end part (76) having a defined shape and is adapted to fit onto the first end part (54) of the hydraulic jack (52) in a manner that the defined part (82) of the valve element (68) should be parallel to and slightly separated from the defined part (22) of the frame structure (20) when the hydraulic jack (52) is in its first position.
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