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