District heating line systems
trunk line heating furnace
high frequency current heating on line process
heating exchange of floor heating
H.F. heating high frequency heating
A line used as both sterile and maintaining line
agonic line {agonic line of no declination}
Dual purpose line with nucleic male sterile line
Fault Cutoff Line Allan Line
Male sterility line and maintainer line
velocity line of arc line short band
200MW Low Temperature Nuclear Heating Plant
5MW nuclear district heating plant
5MW Test heating reacror