bit jet size
51Zoids — For the microscopic lifeform, see Zooid. Zoids franchise logo (1999–present) Contents …
52Drilling mud — In geotechnical engineering, drilling mud, also known as spud mud (when beginning the drilling process), is a drilling fluid used to drill boreholes into the earth. Often used while drilling oil and natural gas wells and on exploration drilling… …
53Negative Syndicate — A Negative Syndicate (ネガティブシンジケート, Negatibu Shinjikēto?) is any of the fictional antagonistic organizations who seek out the Precious in the 30th Super Sentai Series GoGo Sentai Boukenger. This title is given to them by the Search Guard Successor …
54coal mining — Coal was very important in the economic development of Britain. It was used as fuel in the factories built during the Industrial Revolution and continued to be important until the 1980s. The main coalfields are in north east England, the north… …
55literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… …
56XB-70 Valkyrie — Infobox Aircraft name=XB 70 Valkyrie type=Strategic bomber Supersonic research aircraft manufacturer=North American Aviation caption= designer= first flight=21 September 1964 introduced= retired= number built=2 XB 70s status=Retired from testing… …
57Grinding wheel — Grinding wheels A grinding wheel is an expendab …
58Ferroelectric RAM — (FeRAM or FRAM [FeRAM is the accepted generic acronym for ferroelectric random access memory.] ) is a random access memory similar in construction to DRAM but uses a ferroelectric layer instead of a dielectric layer to achieve non volatility.… …
59Russia — /rush euh/, n. 1. Also called Russian Empire. Russian, Rossiya. a former empire in E Europe and N and W Asia: overthrown by the Russian Revolution 1917. Cap.: St. Petersburg (1703 1917). 2. See Union of Soviet Socialist Republics. 3. See Russian… …
60tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …
