The flow cell allows fast and simple removal and replacement of substrates while insuring {HEAD ~ a tight seal} around the substrate to minimize the leakage of reagents in the flow cell, and it locates the active surface of the substrate at the focal plane of the image former with a high degree of {TAIL ~ accuracy} and repeatability 
The flow cell allows fast and simple removal and replacement of substrates while insuring { HEAD ~ a tight seal } around the substrate to minimize the leakage of reagents in the flow cell , and it locates the active surface of the substrate at the focal plane of the image former with a high degree of { TAIL ~ accuracy } and repeatability
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