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2. Trapped-key interlocking - Wikipedia

   en.wikipedia.org/wiki/Trapped-key_interlocking

   This is a trapped-key interlock on the door of an electrical switchgear cabinet. It is attached with one-way security screws to discourage casual removal, which would defeat the interlock scheme. Trapped-key interlocking utilizes locks and keys for sequential control of equipment and machinery to ensure safe operation. Trapped-key interlocks ...

3. Interlock (engineering) - Wikipedia

   en.wikipedia.org/wiki/Interlock_(engineering)

   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 ...

4. Annett's key - Wikipedia

   en.wikipedia.org/wiki/Annett's_key

   Groundframe, with the two rightmost levers locked by Annett's key. In British, Australian, French, and Swiss railway signalling, an Annett's key is a form of trapped-key interlocking that locks levers or other items of signalling apparatus, thereby serving as a portable form of interlocking.

5. File:Trapped key interlock switchgear door.JPG - Wikipedia

   en.wikipedia.org/wiki/File:Trapped_key_interlock...

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6. Fortress (2021 film) - Wikipedia

   en.wikipedia.org/wiki/Fortress_(2021_film)

   Fortress is a 2021 American action film directed by James Cullen Bressack and written by Alan Horsnail, based on a story by Emile Hirsch and Randall Emmett. It stars Jesse Metcalfe , Bruce Willis , Chad Michael Murray , Kelly Greyson , Ser'Darius Blain , and Shannen Doherty .

7. The Fortress Series - Wikipedia

   en.wikipedia.org/wiki/The_Fortress_Series

   Fortress is a series of fantasy novels by American writer C. J. Cherryh, published by HarperCollins. They are set in a medieval fantasy world with a 15th-century feel and feature magic , sorcery, medieval warfare , politics and other elements common to the high fantasy subgenre.

8. 500 Keys - Wikipedia

   en.wikipedia.org/wiki/500_Keys

   In its original American broadcast on May 15, 2011, "500 Keys" was viewed by an estimated 6 million households and received a 2.5 rating/7 share among adults between the ages of 18 and 49. [4] This means that it was seen by 2.5% of all 18- to 49-year-olds, and 7% of all 18- to 49-year-olds watching television at the time of the broadcast.

9. List of The Legend of Qin episodes - Wikipedia

   en.wikipedia.org/wiki/List_of_The_Legend_of_Qin...

   In the north, Prince Fu Su continues to ride with his troops to meet general Meng Tian, managing to shake off the following wolves. Also in the north, General Meng Tian confronts Tou Man, a Xiongnu chief of the Northern Wolves at his fortress, saying that in no more than half an hour, he can destroy the fortress wall using only 10 men. If he ...