The selection and {HEAD ~ manufacture} of {TAIL ~ such apparatus} is within the ordinary skill in the art and can be done using components which are easily constructed or obtained from commercial suppliers 
of
The selection and { HEAD ~ manufacture } of { TAIL ~ such apparatus } is within the ordinary skill in the art and can be done using components which are easily constructed or obtained from commercial suppliers
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL 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