The crystal is annealed for a period of time and at {HEAD ~ a temperature} to provide {TAIL ~ substantially maximum acoustic attenuation} at the operating frequency of the transducer 
to provide
The crystal is annealed for a period of time and at { HEAD ~ a temperature } to provide { TAIL ~ substantially maximum acoustic attenuation } at the operating frequency of the transducer
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH