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An extension ladder. A ladder is a vertical or inclined set of rungs or steps commonly used for climbing or descending. There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top.
Ladder Dogs (in the form of pawls) are used on extension ladders to temporarily anchor their sections to one-another. [3] Table saw Pawls are used on table saws to prevent a workpiece being sawn from kicking back. [4] Transmission A parking pawl is a device in an automobile automatic transmission which prevents it from moving when the vehicle ...
Steeplejacks erect ladders on church spires, industrial chimneys, cooling towers, bell towers, clock towers, or any other high structure.In the UK, steeplejacks now use a belay rope fall-arrest system (similar to the method used by rock climbers) attached to the ladders as they are erected to eliminate solo climbing and greatly reduce the risk of falls from height.
It may hold another object in place by blocking it, clamping it, or otherwise obstructing its movement. Or it may couple various parts together so that they move in unison – the primary example of this being a flexible drive to mate two shafts in order to transmit torque. Some devices use dog clutches to lock together two spinning components.
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Choose your Most Memorable Sports Moment of 2024. Choose between the Kansas City Chiefs winning the Super Bowl, the Summer Olympic Games in Paris, France, or LA Dodgers Shohei Ohtani becoming the ...
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