| 摘要 |
The medium-conducting unit comprises a first part arranged in or on the unit for controlling the medium throughflow to an associated tool or equipment. The first part is longitudinally displaceable in relation to a second part. The first part is arranged, in dependence upon relative displacements between the first and second parts, to adopt at least one opening position and a second end position. An exhaust passage is associated with the opening position to provide a large exhaust area. The arrangement is such that when the two parts are in the second position, flow of medium through the exhaust passage is reduced or prevented. |
