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A forcible entry tool for removing cylinder locks; used with a Halligan bar. Kelly tool A prying tool much like a Halligan tool without the right-angle pointed tip. Knox Box A box secured to the outside (esp. of a commercial occupancy) containing master keys, accessible by a high-security key available to responding firefighters.
The blue valve body is visible in-line with the pipe. The valve actuator opens or closes the butterfly disc of the valve based on electrical signals sent to the actuator. Another valve actuator is visible in the background, with windows to indicate the valve position. A valve actuator is the mechanism for opening and closing a valve. Manually ...
Unlike a ball valve, the disc is always present within the flow, so it induces a pressure drop, even when open. A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The "butterfly" is a metal disc mounted on a rod. When the valve is ...
Slot screw drives have a single horizontal indentation (the slot) in the fastener head and is driven by a "common blade" or flat-bladed screwdriver.This form was the first type of screw drive to be developed, and, for centuries, it was the simplest and cheapest to make because it can just be sawed or filed.
The depth of cut screw of a "Bailey" (or "Stanley-Bailey") type metal plane (tool) for the blade to move in the direction of a regulating right hand finger Some Edison base lamps and fittings (such as those formerly used on the New York City Subway or the pre- World War I Sprague-Thomson rolling stock of the Paris Metro ) have a left-hand ...
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