{HEAD ~ The angle} of beveling or obliquely cutting {TAIL ~ one or more corner portions} of 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 
{ HEAD ~ The angle } of beveling or obliquely cutting { TAIL ~ one or more corner portions } of 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
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH REL REL TAIL 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 OTH OTH OTH OTH OTH