vacuum insulation
91Cold-weather biking — A bicycle set up for winter commuting with metal studded tires, enclosed chain case, and drum brakes Cold weather biking (also referred to as winter biking, snowbiking or icebiking) is the activity of cycling in winter weather with snow, ice, and …
92Circuit breaker — For other uses, see Circuit breaker (disambiguation). An air circuit breaker for low voltage (less than 1000 volts) power distribution switchgear …
93petroleum refining — Introduction conversion of crude oil into useful products. History Distillation of kerosene and naphtha The refining of crude petroleum owes its origin to the successful drilling of the first oil well in Titusville, Pa., in 1859. Prior to… …
94Crookes radiometer — The Crookes radiometer, also known as the light mill, consists of an airtight glass bulb, containing a partial vacuum. Inside are a set of vanes which are mounted on a spindle. The vanes rotate when exposed to light, with faster rotation for more …
95Furnace — For other uses, see Furnace (disambiguation). Industrial Furnace from 1907 A furnace is a device used for heating. The name derives from Latin fornax, oven. In American English and Canadian English, the term furnace on its own is generally used… …
96Electronic packaging — is a major discipline within the field of electronic engineering, and includes a wide variety of technologies. It refers to enclosures and protective features built into the product itself, and not to shipping containers. It applies both to end… …
97Test and tagging — is a generic name given to the process of visually inspecting and electrically testing in service electrical equipment for personal use and/or safety. Colloquially, it is also referred to as; tagging, test tag, test and tag, electrical tagging,… …
98wood — wood1 woodless, adj. /wood/, n. 1. the hard, fibrous substance composing most of the stem and branches of a tree or shrub, and lying beneath the bark; the xylem. 2. the trunks or main stems of trees as suitable for architectural and other… …
99Wood — /wood/, n. 1. Grant, 1892 1942, U.S. painter. 2. Leonard, 1860 1927, U.S. military doctor and political administrator. * * * I Hard, fibrous material formed by the accumulation of secondary xylem produced by the vascular cambium. It is the… …
100Glossary of rail terminology — Rail transport Operations Track Maintenance High speed Gauge Stations …
