Widespread Employs: to offer a concrete mass, for base-mounted centrifugal pumps, that prevents differential motion concerning driving and pushed associates, connected by a flex travel; to decrease the massive vibration amplitude (unbalanced forces) present in air compressors and vacuum pumps; to reduced the center of gravity of tall, narrow units; https://structural-steel-inertia24680.shotblogs.com/the-smart-trick-of-concrete-filled-vibration-isolation-base-that-no-one-is-discussing-53539564