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