Further, by the use of the foregoing accumulator for replenishment, when the hydraulic cylinder is withdrawn, it is extended a required length merely by detecting the lower limit value of the appropriate travelling range and {HEAD ~ the height} of the boom is restored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Further , by the use of the foregoing accumulator for replenishment , when the hydraulic cylinder is withdrawn , it is extended a required length merely by detecting the lower limit value of the appropriate travelling range and { HEAD ~ the height } of the boom is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