{TAIL ~ The capillary} is circular in cross section, this being obtained by drilling or extrusion of {HEAD ~ a cylindrical bar} made of dielectric material 
{ TAIL ~ The capillary } is circular in cross section , this being obtained by drilling or extrusion of { HEAD ~ a cylindrical bar } made of dielectric material
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH