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A key exchange block may only hold and release keys and may not have a bolt to interlock process equipment, or may be part of the interlock of a particular machine or device. This is a transfer block, part of a trapped-key interlock system. It does not have a bolt to stop operation of a device, but holds and releases other keys.
The key will not turn unless the remaining keys are put back in place. Trapped key interlock transfer block. Another example is an electric kiln. To prevent access to the inside of an electric kiln, a trapped key system may be used to interlock a disconnecting switch and the kiln door. While the switch is turned on, the key is held by the ...
The second is a link to the article that details that symbol, using its Unicode standard name or common alias. (Holding the mouse pointer on the hyperlink will pop up a summary of the symbol's function.); The third gives symbols listed elsewhere in the table that are similar to it in meaning or appearance, or that may be confused with it;
The post 96 Shortcuts for Accents and Symbols: A Cheat Sheet appeared first on Reader's Digest. ... No problem! Just hit the Fn key, located on the bottom row, left-hand-side next to the control ...
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Wire crossover symbols for circuit diagrams. The CAD symbol for insulated crossing wires is the same as the older, non-CAD symbol for non-insulated crossing wires. To avoid confusion, the wire "jump" (semi-circle) symbol for insulated wires in non-CAD schematics is recommended (as opposed to using the CAD-style symbol for no connection), so as to avoid confusion with the original, older style ...
A FBI document obtained by Wikileaks details the symbols and logos used by pedophiles to identify sexual preferences. According to the document members of pedophilic organizations use of ...
Symbols were collected from a variety of sources, including railways, Olympic events, airports and government agencies to form a catalog of each type of symbol to be created for close examination. A key goal was to avoid starting from scratch when possible, and instead build off previous development of robust symbol designs in existing systems. [2]