Backdraft Dampers. Backdraft Damper Training Application Backdraft dampers allow air to flow in one direction only and prevent unwanted (hot/cold outside.
The Dinosaurs of Jurassic Park. Velociraptor Bipedal, feathered carnivore 6-7 feet long; 2 feet tall 15-35 lbs. Lived in Cretaceous.
LIFTING AND MOVING HEAVY OBJECTS. Introduction Rescue personnel often think that the physical laws of the universe do not apply when there is "an emergency.“