{HEAD ~ A sample changer} for {TAIL ~ a balance} with a weighing pan has at least two sample carriers that are spaced apart from each other 
for
{ HEAD ~ A sample changer } for { TAIL ~ a balance } with a weighing pan has at least two sample carriers that are spaced apart from each other
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 OTH OTH OTH OTH