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A plan and side view of a generic, empty canal lock. A lock chamber separated from the rest of the canal by an upper pair and a lower pair of mitre gates.The gates in each pair close against each other at an 18° angle to approximate an arch against the water pressure on the "upstream" side of the gates when the water level on the "downstream" side is lower.
A canal lock system in modern-day France which uses the pound lock system developed during the Song dynasty. In ancient China, the sluice gate, the canal lock, and flash lock had been known since at least the 1st century BCE (as sources then alluded that they were not new innovations), during the ancient Han dynasty (202 BCE–220 CE). [67]
A side pound is a particular type of extremely short lock pound, which is extended sideways to make up for the short distance between locks so as to avoid excessive level fluctuations. An example of this is the Caen Hill locks on the Kennet and Avon Canal. Climbing the hill that leads to Devizes requires 29 locks. The first seven and the last ...
3rd or 4th century CE Kamasutra, Vatsyayana, 13th-century Jayamangala commentary of Yashodhara, Bendall purchase 1885 CE.Kamasutra elaborate the idea of Shadanga. [6]The concept of the Six Limbs of Indian Painting, or Ṣaḍaṅga, finds its roots in ancient Indian texts and treatises on art and aesthetics, reflecting a holistic approach to artistic creation.
A guillotine lock is a type of canal lock. The lock itself operates on the same principle as any normal pound lock , but is unusual in that each gate is a single piece, usually of steel , that slides vertically upwards when opened to allow a boat to traverse underneath.
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In addition, extant examples of early medieval Insular art, such as stone decorations and illuminated manuscripts, as well as Japanese, Chinese, and Islamic decorative arts from different periods, feature key patterns. [3] [4] [9] [10] Celtic mazes, Greek frets, and xicalcoliuhquis are examples of well-known designs that are considered to be ...
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