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