| 摘要 |
The invention relates to an equipment that comprises a first member (1) movable in a displacement direction and through which a fluid can flow, a second movable member (2), and a device (3) for projecting a jet of fluid, characterised in that the first movable member (1), when viewed in the direction of the jets of the projection device, is provided between the projection device (3) and the second movable member (2) at the jet projection point on the first movable member (1). |
