During operation of the device of FIG 1, a charge of coal 11 to be coked is introduced through filling opening 9 into coking chamber 3, which in {HEAD ~ this embodiment} is designed as {TAIL ~ a cavity} or chamber resonator 
is designed as
During operation of the device of FIG 1 , a charge of coal 11 to be coked is introduced through filling opening 9 into coking chamber 3 , which in { HEAD ~ this embodiment } is designed as { TAIL ~ a cavity } or chamber resonator
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 OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH