{HEAD ~ Features} on the blade cooperate with {TAIL ~ features} on the collection chamber to secure the blade to the collection chamber 
cooperate with
{ HEAD ~ Features } on the blade cooperate with { TAIL ~ features } on the collection chamber to secure the blade to the collection chamber
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH