The device structure allows {TAIL ~ the display} to be easily visible by the user and {HEAD ~ insertion} of the cartridge is easily accessible and visible during use 
The device structure allows { TAIL ~ the display } to be easily visible by the user and { HEAD ~ insertion } of the cartridge is easily accessible and visible during use
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH