Further, by the use of the foregoing accumulator for {TAIL ~ replenishment}, when the hydraulic cylinder is withdrawn, it is extended a required length merely by detecting the lower limit value of the appropriate travelling range and the height of {HEAD ~ the boom} is restored to the upper limit value of the same range automatically 
Further , by the use of the foregoing accumulator for { TAIL ~ replenishment } , when the hydraulic cylinder is withdrawn , it is extended a required length merely by detecting the lower limit value of the appropriate travelling range and the height of { HEAD ~ the boom } is restored to the upper limit value of the same range automatically
OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH