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