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[APML] N2 introduction point

Are there any opinions about if it is better to put the N2 in front of the
film
or behind the film for an N2 purge? I suppose it should be in both places,
but is
sufficient amounts of it getting to both places if it is only introduced
from front or
rear? I'm sealing off the OA guider with a filter.
Bobby Middleton


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