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Cable railing requires very rigid frames compared to many other types of railings due to the forces applied to the end posts by tensioning the cables. Cables must be tensioned to provide minimum cable deflection using 4-inch sphere, to satisfy building code requirements. [ 2 ]
A guide rail is a system designed to guide vehicles back to the roadway and away from potentially hazardous situations. [4] There is no legal distinction between a guide rail and a guard rail . According to the US Federal Highway Administration , the terms guardrail and guiderail are synonymous.
Tele Vue once manufactured a 5" refracting telescope named the MPT, the Multi-Purpose Telescope. It had a fast f/4 ratio, and had an adjustable diaphragm that ranged from f/4 to f/20. Only a small number were made, with the last being kept by Televue to use as a final optical quality control for all eyepieces they make.
3 mm scale, also known as 3 mm finescale, is a model railway scale of 3 mm : 1 ft (305 mm) used for British prototypes.Introduced as British TT gauge, it sits approximately halfway between British N gauge and OO gauge but is not as popular as either and there is no longer any mass manufacturer ready-to-run support.
The USB Type-C Cable and Connector Specification specifies a mapping from a USB-C jack to a 4-pole TRRS jack, for the use of headsets, and supports both CTIA and OMTP (YD/T 1885–2009) modes. [79] Some devices transparently handle many jack standards, [80] [81] and there are hardware implementations of this available as components. [82]
Tru-Vue Chicagoland model 3D viewer with package and black&white films A Tru-Vue viewer and film cards from 1953, by which time the company had relocated to Oregon and become a subsidiary of Sawyer's.
AOL Mail offers a secure and user-friendly email service with spam protection, folders, keyboard shortcuts and more.