Meanwhile, in a service
area, Ethan and Krieger climbed up into the open vented and ducted A / C system to crawl over the
sealed vault room, where they blocked the laser net's beams, unscrewed the bolts
holding the A / C vent cover, and then Ethan lowered himself (head - first by a cable / winch system
held by Krieger) through the vent hole into the locked - down computer room.
«The floors of animal housing
areas and
holding facilities must be constructed of an impervious material that is free of cracks and
sealed to assist with drainage and disinfection.»