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door breaching
Door breaching is a process used by military, police, or emergency services to force open closed and/or locked doors. A wide range of methods are available, one or more of which may be used in any given situation. These methods may be divided up into mechanical breaching, ballistic breaching, explosive breaching, and thermal breaching.〔 Section 3-20, Breaching〕
==Mechanical breaching==
Mechanical breaching can be minimally destructive, through the use of lock picks. This method is relatively slow and requires a trained operator, but does not damage the lock or door. Using specialized tools (i.e.: A-tool, K-tool), a lock cylinder can also be quickly dismantled and unlocked without removing it from the door; this method also allows the door to be closed and re-locked. Mechanical breaching also includes hydraulic breaching, which uses a special hydraulic ram to overcome the lock. The hydraulic ram may be powered manually, pneumatically, or electrically. More dynamic methods (kinetic breaching) use force to break the lock or door. The common methods are to use a lever, such as a Halligan bar or crowbar, or to use a tool to concentrate a large amount of force on the door, such as a sledgehammer, hydraulic jack, or battering ram.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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