The recess for insertion of {HEAD ~ the cartridge} in {TAIL ~ the first part} being distant from the desk top prevents dust and dirt to enter the housing and impairing the sensitive measurement of the sample 
in
The recess for insertion of { HEAD ~ the cartridge } in { TAIL ~ the first part } being distant from the desk top prevents dust and dirt to enter the housing and impairing the sensitive measurement of the sample
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH