The angle of beveling or obliquely cutting {HEAD ~ one or more corner portions} of {TAIL ~ the series resonators S1} and S2 may not necessarily be 45° and may alternatively be 30°, 60° or any other appropriate angle or, still alternatively, they may be arcuately beveled with a given radius of curvature 
of
The angle of beveling or obliquely cutting { HEAD ~ one or more corner portions } of { TAIL ~ the series resonators S1 } and S2 may not necessarily be 45 ° and may alternatively be 30 ° , 60 ° or any other appropriate angle or , still alternatively , they may be arcuately beveled with a given radius of curvature
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL 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 OTH OTH OTH OTH OTH