This means the first part of the housing terminates with {TAIL ~ one front side} of the cartridge or the front side projects somewhat over the first part of {HEAD ~ the housing} 
This means the first part of the housing terminates with { TAIL ~ one front side } of the cartridge or the front side projects somewhat over the first part of { HEAD ~ the housing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD