... steel,heat insulated,top off- center votical agitator,conical head,airtight manhole, breather valve,digital readout thermometer,anti- ... steel,heat insulated,top off- center votical agitator,conical head,airtight manhole, breather valve,digital readout thermometer,anti ... steel,heat insulated,top off- center votical agitator,conical head,airtight manhole, breather valve,digital readout thermometer,anti ...