The lid part and the base part are in {HEAD ~ addition} designed with {TAIL ~ elastic properties} so that the pressure with which the bearing surface presses onto the test layer package is substantially constant in the tolerance range of the thickness of the test field package  
designed with
The lid part and the base part are in { HEAD ~ addition } designed with { TAIL ~ elastic properties } so that the pressure with which the bearing surface presses onto the test layer package is substantially constant in the tolerance range of the thickness of the test field package
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH