{TAIL ~ Abutting edges} of the individual material layers extend in the direction of the resonator body axis and {HEAD ~ the abutting edges} of the individual material layers are offset relative to each other in circumferential direction of the hollow cylinder 
{ TAIL ~ Abutting edges } of the individual material layers extend in the direction of the resonator body axis and { HEAD ~ the abutting edges } of the individual material layers are offset relative to each other in circumferential direction of the hollow cylinder
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH