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.
1 Damper (mast) , a device that damps oscillation in radio masts and towers for better protection against storms. 2  Tuned mass damper, a device mounted in structures to prevent discomfort, damage or structural failure by vibration. 3  Damper (flow) , a mechanical device in a duct or chimney that regulates airflow.