Item duplication. 1  Step 1. Have the block you want to duplicate in front of you. ( 2 Examples: Diamond, Gold, or Iron.). 3  Step 2. 4  Now you might want to have a Iron pickaxe or Diamond pickaxe. 5  Step 3. Use you'r pickaxe to quickly mine it.
Heavy Duty/Industrial. A backdraft damper is an isolation damper allowing air in one direction only. Greenheck's HB damper series is designed to prevent back flow at static pressures and velocities up to 20 in. wg and 6400 fpm, respectively.
damper. noun dampÂ·er \Ëdam-pÉr\. Tweet. : a flat piece of metal in a fireplace, furnace, etc., that controls the amount of air that can enter. : a small piece of wood inside a piano that is covered with cloth and that stops the movement of a piano string.