In {TAIL ~ a development} of the invention, {HEAD ~ the positioning unit} is configured in the manner of an armature which is rigidly attached to the piston and is axially displaceable in a specified manner by means of a proportional magnet 
In { TAIL ~ a development } of the invention , { HEAD ~ the positioning unit } is configured in the manner of an armature which is rigidly attached to the piston and is axially displaceable in a specified manner by means of a proportional magnet
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH