The two substrate boats, {HEAD ~ each} configured to hold {TAIL ~ a set} of substrates, may be assembled in a way that the two sets of substrates interleave with one another 
configured to hold
The two substrate boats , { HEAD ~ each } configured to hold { TAIL ~ a set } of substrates , may be assembled in a way that the two sets of substrates interleave with one another
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL 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