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[citation needed] Popular sword manufacturers that use 5160 spring steel include Hanwei and Generation 2. [citation needed] 5160 spring steel is mainly used on Medieval type swords. [citation needed] 4140 [definition needed] 6150, a chromium-vanadium alloy. Similar to 4140, 6150 is a tough steel with high impact resistance.
Another anti-sweeping mechanism is a ship-counter in the mine fuze. When enabled, this allows detonation only after the mine fuze has been triggered a pre-set number of times. To further complicate matters, influence mines may be programmed to arm themselves (or disarm automatically—known as self-sterilization) after a pre-set time. During ...