In preparation for use of the flow cell, the base 11 may be fixed in {HEAD ~ position} to {TAIL ~ a mounting ring} on an optical breadboard 
to
In preparation for use of the flow cell , the base 11 may be fixed in { HEAD ~ position } to { TAIL ~ a mounting ring } on an optical breadboard
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH