An oxidizing gas, preferably pressurized air, is periodically fed into the exhaust line by {HEAD ~ an oxidizing gas line} for cleaning the drain line and {TAIL ~ the pressure} controlling aperture therein by oxidizing the magnesium 
An oxidizing gas , preferably pressurized air , is periodically fed into the exhaust line by { HEAD ~ an oxidizing gas line } for cleaning the drain line and { TAIL ~ the pressure } controlling aperture therein by oxidizing the magnesium
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH