Most Banks try to project a friendly and open image. If we use bullet-proof glass or iron bars in front of the teller's cages.

The load method of the system is that installing a throttle ahead of a proportional overflow valve, and the throttle can prevent the effect of the pressure impulsion upon sensors and meters.

After the outbreak of the American Civil War in 1861, both Union and Confederate soldiers used the "Minnie" bullet (as they called it) in their muzzle-loading rifles.