Beehive coke ovens were called that because they were built in a beehive-like hemispherical shape, and then covered with earth. Cross section of a Hand-drawn Beehive Coke Oven. The Beehive Ovens were built in banks of ovens, called a battery, with a strong retaining wall in front, and then covered with earth.
One such technique is called âbumping.â Lock bumping, also referred to as key bumping is an attack technique using specially cut keys, known as bump keys, that can defeat conventional pin and tumbler door locks.
For the cartoon series, see Speed Bump. For speed changes in cinematography, see Speed ramping. Speed bumps (or speed breakers) are the common name for a family of traffic calming devices that use vertical deflection to slow motor-vehicle traffic in order to improve safety conditions. Variations include the speed hump (or speed ramp), speed cushion, and speed table. The use of vertical deflection devices is widespread around the world, and they are most commonly found where vehicle speeds are statutorily mandated to be low, usually 40 km/h (25 mph), or 8 to 16 km/h (5.0 to 9.9 mph) in car parks.