glass-reinforced plastic case
21Transparency and translucency — Diaphanes redirects here. For the genus of firefly, see Diaphanes (beetle). Translucence redirects here. For other uses, see Translucence (disambiguation). Translucent redirects here. For the Japanese manga series, see Translucent (manga).… …
22M16 rifle — Rifle, 5.56 mm, M16 From top to bottom: M16A1, M16A2, M4A1, M16A4 Type Assault rifle Place  …
23Planetarium — A planetarium is a theatre built primarily for presenting educational and entertaining shows about astronomy and the night sky, or for training in celestial navigation. A dominant feature of most planetariums is the large dome shaped projection… …
24Optimist dinghy — Infobox Sailboat Specifications class symbol = numberofcrew = One loa = 7 ft 9 in (2.36 m) lwl = 7 ft (2.13 m) beam = 3 ft 8 in (1.12 m) draft = 5 in (0.13 m) / 2 ft 9 in (0.84 m) hull = 77 lb (35 kg) mainsailandjib= mastheight = 7 ft 5 in (2.26… …
25Fuse (electrical) — A miniature time delay fuse used to protect electronic equipment, rated 0.3 amperes at 250 volts. 1.25 inches (about 32 mm) long …
26Optical lens design — refers to the calculation of lens construction parameters (variables) that will meet a set of performance requirements and constraints, including cost and schedule limitations. Construction parameters include surface profile types (spherical,… …
27Motorcycle fairing — This article is about motorcycle design. For other uses of fairing , see Fairing (disambiguation). 1956 NSU world record setting Dolphin II …
28Optimist (dinghy) — Optimist Class Symbol …
29Narrowboat — Modern narrowboats for leisure cruising, Bugsworth Basin, Buxworth, Derbyshire, England A narrowboat or narrow boat is a boat of a distinctive design, made to fit the narrow canals of Great Britain. In the context of British Inland Waterways,… …
30Shovel — For other uses, see Shovel (disambiguation). A man carrying shovels …
