The defrost vessel 13, wherein at least one antenna includes {HEAD ~ a plurality} of 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 {TAIL ~ the cover} 
The defrost vessel 13 , wherein at least one antenna includes { HEAD ~ a plurality } of 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 { TAIL ~ the cover }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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 TAIL TAIL TAIL TAIL TAIL TAIL