Thus, {HEAD ~ the magnetic powder} in {TAIL ~ this mixing ratio} is specifically suitable for magnetic recording in a long wavelength range 
in
Thus , { HEAD ~ the magnetic powder } in { TAIL ~ this mixing ratio } is specifically suitable for magnetic recording in a long wavelength range
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH