{HEAD ~ A leak} occurring in a pneumatic system operating with a nonvolatile gas such as nitrogen poses {TAIL ~ little danger}, while a leak occurring in a hydraulic system can result in contamination of the oven or the workpiece or fire risks if a flammable hydraulic fluid is used 
{ HEAD ~ A leak } occurring in a pneumatic system operating with a nonvolatile gas such as nitrogen poses { TAIL ~ little danger } , while a leak occurring in a hydraulic system can result in contamination of the oven or the workpiece or fire risks if a flammable hydraulic fluid is used
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL 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