Such sensing devices may, for example, detect {HEAD ~ the acceleration}, {TAIL ~ speed} or position of the piston of such a system relative to the corresponding cylinder, for example 
Such sensing devices may , for example , detect { HEAD ~ the acceleration } , { TAIL ~ speed } or position of the piston of such a system relative to the corresponding cylinder , for example
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH