pressure

WS of car traveling down freeway. CU of tire and explanation that tire…

On a firm that makes “christmas trees,” a nickname for a part of an oil…

About coffee processing and packing. CU of woman weighing coffee on a…

Washington. Giant rolls of sheet aluminum in a plant in Spokane,…

CU of dial barometer. A narrator explains when it reads high the…

Simple animation of a train collision. Two tank cars collide and one…