{HEAD ~ The defrost vessel} 13, wherein at least one antenna includes a plurality of {TAIL ~ antennas} extending from outside of the space through the cover into the space, one of the antennas extending through a coupling hole at a center of the cover 
{ HEAD ~ The defrost vessel } 13 , wherein at least one antenna includes a plurality of { TAIL ~ antennas } extending from outside of the space through the cover into the space , one of the antennas extending through a coupling hole at a center of the cover
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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