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==Genel özellikler==
They are in effect a trench firing step hardened to protect against small-arms fire and grenades and raised to improve the field of fire.
The concrete nature of pillboxes means that they are a feature of prepared positions. They were probably first used in the Hindenburg Line. This is likely to have been the time when they acquired their incongruous English name. The Oxford English Dictionary's earliest record of the use of the word pillbox in connection with a defensive post is from 13 September 1917, after the German withdrawal onto the Hindenburg Line.[2]