{HEAD ~ Methods} of interconnecting the parts are known such as {TAIL ~ screwing}, snap fitting, friction fitting and gluing one part to the other 
{ HEAD ~ Methods } of interconnecting the parts are known such as { TAIL ~ screwing } , snap fitting , friction fitting and gluing one part to the other
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH