four-way directional control valve
21steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
22sports — /spawrts, spohrts/, adj. 1. of or pertaining to a sport or sports, esp. of the open air or athletic kind: a sports festival. 2. (of garments, equipment, etc.) suitable for use in open air sports, or for outdoor or informal use. [1910 15; SPORT +… …
23Glossary of nautical terms — This is a glossary of nautical terms; some remain current, many date from the 17th 19th century. See also Wiktionary s nautical terms, Category:Nautical terms, and Nautical metaphors in English. Contents: A B C D E F G H I J K L M N O P Q R …
24List of problems solved by MacGyver — This is a list of problems that have been solved by the fictional character MacGyver from the television series of the same name. (This list is not yet comprehensive.) MacGyver employs his resourcefulness and his knowledge of chemistry,… …
25MythBusters (2008 season) — Country of origin Australia United States No. of episodes 20 (includes 8 specials) Broadcast Original channel Discovery Channel …
26Opto-isolator — This article is about the electronic component. For the optical component, see optical isolator. Schematic diagram of an opto isolator showing source of light (LED) on the left, dielectric barrier in the center, and sensor (phototransistor) on… …
27Spider-Man's powers and equipment — The fateful spider bite that gave Peter Parker his powers. Amazing Fantasy #15, art by Steve Ditko. Spider Man s powers, abilities, and equipment are used by Marvel Comics superhero Spider Man in tandem to combat his many foes. He receives most… …
28sound reception — Introduction response of an organism s aural mechanism, the ear, to a specific form of energy change, or sound waves. Sound waves can be transmitted through gases, liquids, or solids, but the hearing function of each species is particularly …
29Republic P-47 Thunderbolt — P 47 Thunderbolt In flight view of a prototype of the Republic P 47N Thunderbolt Role Fighter bomber …
30Sound film — …
