{TAIL ~ A method} of forming a pipe or tube connecting section 1, comprising the additional step of pressing {HEAD ~ the form} between complementary male and female dies to form the two channels 
{ TAIL ~ A method } of forming a pipe or tube connecting section 1 , comprising the additional step of pressing { HEAD ~ the form } between complementary male and female dies to form the two channels
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH