A gas-permeable plug is adapted to be inserted in an insertion hole formed through a part of a casing in an inward-outward direction. This organic solvent mixture comprises an alcohol in which one or more film-forming polymers used in the formulation are soluble at room temperature. For example, a system can include one or more magnets that are operative to move alongside a circuit board that includes printed coils. Steam that has condensed is revaporized by directing RFMW radiation to the steam allowing for more bitumen to be produced without injecting more steam.