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2. Lock (water navigation) - Wikipedia

   en.wikipedia.org/wiki/Lock_(water_navigation)

   The boat enters the lock. 8–9. The boat enters the lock. 3. The lower gates are closed. 10. The upper gates are closed. 4–5. The lock is filled with water from upstream. 11–12. The lock is emptied by draining its water downstream. 6. The upper gates are opened. 13. The lower gates are opened. 7. The boat exits the lock. 14. The boat exits ...

3. Slaymaker lock company - Wikipedia

   en.wikipedia.org/wiki/Slaymaker_lock_company

   The lock company, Slaymaker, Barry and Company, was founded in 1888 by Samuel R. Slaymaker and John F. Barry of Connellsville, Pennsylvania.Samuel Slaymaker had become interested in switch and signal locks while working for the Pennsylvania Railroad as a civil engineer.

4. Eisenhower Lock - Wikipedia

   en.wikipedia.org/wiki/Eisenhower_Lock

   The Eisenhower Lock is one of the seven canal locks on the St Lawrence River leg of the St Lawrence Seaway. [1] This lock provides a 38 foot lift for ships heading upstream. [2] It is one of two locks located near Massena, New York. The lock was constructed to bypass the portion of the St Lawrence River known as the Long Sault.

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   AOL latest headlines, entertainment, sports, articles for business, health and world news.

6. 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 ...

7. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

8. U.S. Elections - Latest News and Updates on ... - AOL

   www.aol.com/politics/elections

   Get the latest updates on the U.S. Elections. Stay informed with fast facts, candidate updates, and key takeaways on the issues, all in one place.

9. Airlock - Wikipedia

   en.wikipedia.org/wiki/Airlock

   An airlock on board the Space Shuttle. An airlock [a] is a room or compartment which permits passage between environments of differing atmospheric pressure or composition, while minimizing the changing of pressure or composition between the differing environments.