The diaphragm 4 is moved with a suction stroke in direction B and a delivery stroke in direction C by {TAIL ~ means} of a hydraulic fluid contained in a working chamber 9, that also includes a conventional device 10 for compensating {HEAD ~ leaks} 
The diaphragm 4 is moved with a suction stroke in direction B and a delivery stroke in direction C by { TAIL ~ means } of a hydraulic fluid contained in a working chamber 9 , that also includes a conventional device 10 for compensating { HEAD ~ leaks }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD