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June 2023) (Learn how and when to remove this message) In engineering, a dog is a tool or part of a tool, such as a pawl , that prevents or imparts movement through physical engagement. [ 1 ] It may hold another object in place by blocking it, clamping it, or otherwise obstructing its movement.
Yett hanging in the main entrance of Blackness Castle, Scotland, showing attached bolts and pierced construction.Wrought in 1693. [1]A yett (from the Old English and Scots language word for "gate") [2] is a gate or grille of latticed wrought iron bars used for defensive purposes in castles and tower houses. [3]
An officer’s tool (also known as an A-tool, rex tool, or lock puller) is a forcible entry device used by firefighters and other first responders. Officer’s tools are designed to completely remove cylindrical locks from doors without causing major structural damage, allowing for direct access to the internal locking mechanism.
September 2011) (Learn how and when to remove this message) Typical modern padlock with keys Padlocked door Padlock in the Mayenne Castle Museum (France) Padlocks are portable locks usually with a shackle that may be passed through an opening (such as a chain link , or hasp staple) to prevent use , theft , vandalism or harm .
Wrought iron is an iron alloy with a very low carbon content (less than 0.05%) in contrast to that of cast iron (2.1% to 4.5%). It is a semi-fused mass of iron with fibrous slag inclusions (up to 2% by weight), which give it a wood-like "grain" that is visible when it is etched, rusted, or bent to failure.
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Bronze was an important advance because it had the edge-durability and stiffness that pure copper lacked. Until the advent of iron, bronze was the most advanced metal for tools and weapons in common use (see Bronze Age for more detail). Outside Southwestern Asia, these same advances and materials were being discovered and used around the world.
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related to: wrought iron entrance door hardware removal tooltemu.com has been visited by 1M+ users in the past month