During operation of {TAIL ~ 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 this embodiment is designed as a cavity or {HEAD ~ chamber resonator} 
During operation of { TAIL ~ 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 this embodiment is designed as a cavity or { HEAD ~ chamber resonator }
OTH OTH OTH TAIL 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 OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD