A casting furnace is fed an inert gas under pressure through {TAIL ~ a feed line} with {HEAD ~ the pressure} being regulated by a melt level control device 
A casting furnace is fed an inert gas under pressure through { TAIL ~ a feed line } with { HEAD ~ the pressure } being regulated by a melt level control device
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH