Ads
related to: pound lock principle of measurement practice test template math sheets 3rdstudy.com has been visited by 100K+ users in the past month
Search results
Results From The WOW.Com Content Network
A pound lock has a chamber with gates at both ends that control the level of water in the pound. In contrast, an earlier design with a single gate was known as a flash lock. [4] Pound locks were first used in China during the Song dynasty (960–1279 CE), having been pioneered by the Song politician and naval engineer Qiao Weiyue in 984. [5]
English: Sequence of operation of a canal pound lock: 1. Boat sailing upstream 2. Boat enters lock 3. Downstream gates close 4 and 5. Chamber filled 6. Upstream gates open 7. Boat leaves lock 8. Boat sailing downstream 9. Boat enters lock 10. Upstream gates close 11 and 12. Chamber emptied 13. Downstream gates open 14. Boat leaves lock
A short pound on the Chesterfield Canal in England, United Kingdom. A canal pound (from impound), [1] reach, or level (American usage), is the stretch of level water impounded between two canal locks. Canal pounds can vary in length from the non-existent, where two or more immediately adjacent locks form a lock staircase, to many kilometres/miles.
All three sets of locks are paired; that is, there are two parallel flights of locks at each of the three lock sites. This, in principle, allows ships to pass in opposite directions simultaneously; however, large ships cannot cross safely at speed in the Culebra Cut, so in practice ships pass in one direction for a time, then in the other ...
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!
The Pound–Drever–Hall (PDH) technique is a widely used and powerful approach for stabilizing the frequency of light emitted by a laser by means of locking to a stable cavity. The PDH technique has a broad range of applications including interferometric gravitational wave detectors , atomic physics , and time measurement standards , many of ...