A ram descends due to its own weight and pressure of a rod side cylinder chamber of a hydraulic cylinder which vertically moves {HEAD ~ the ram} is detected by {TAIL ~ an oil pressure detector} 
is detected by
A ram descends due to its own weight and pressure of a rod side cylinder chamber of a hydraulic cylinder which vertically moves { HEAD ~ the ram } is detected by { TAIL ~ an oil pressure detector }
OTH OTH OTH 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 HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL