FIGS 6 and 7 are spectrums of the flexural and torsional vibrations, respectively, of {TAIL ~ cantilever} 120 tapping on a sample surface at {HEAD ~ the fundamental flexural resonance frequency} 
FIGS 6 and 7 are spectrums of the flexural and torsional vibrations , respectively , of { TAIL ~ cantilever } 120 tapping on a sample surface at { HEAD ~ the fundamental flexural resonance frequency }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD