The cartridge after insertion into the first part of the housing is nearly completely or completely enclosed by {HEAD ~ the first part} of {TAIL ~ the housing} 
of
The cartridge after insertion into the first part of the housing is nearly completely or completely enclosed by { HEAD ~ the first part } of { TAIL ~ the housing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL