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