RPM is the acronym used for revolutions per minute. It measures the number of revolutions completed in one minute around a fixed axis, giving the speed of a mechanical component. It is commonly used to describe the performance of automobile engines.
Like most ballparks built from the 1990s onward, Safeco Field is a 'retro-modern' style ballpark that incorporates many of the features of ballparks built in the 1950s and earlier with modern amenities.
Girder men working on the roof of the new East Stand development at Tottenham Hotspur's White Hart Lane ground, London, 17 July 1934. Getty Images. 5/12. Tottenham Hotspur players training on the pitch at White Hart Lane in front of where the new East Stand is being built, 26 July 1934. Getty Images. 6/12