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