drilling equipment set
81D'Arcy Concession — The D Arcy Concession was a petroleum oil concession that was signed in 1901 between William Knox D Arcy and Shah Mozzafar al Din of Persia. The oil concession gave D’Arcy the exclusive rights to prospect for oil in Persia (What is now mostly… …
82commercial fishing — Introduction the taking of fish and other seafood and resources from oceans, rivers, and lakes for the purpose of marketing them. Fishing is one of the oldest employments of humankind. Ancient heaps of discarded mollusk shells (shell… …
83Printed circuit board — Part of a 1983 Sinclair ZX Spectrum computer board; a populated PCB, showing the conductive traces, vias (the through hole paths to the other surface), and some mounted electrical components A printed circuit board, or PCB, is used to… …
84Ford Crown Victoria — 1998 2002 Ford Crown Victoria LX Manufacturer Ford Motor Company Production 1955–1956 1991–2011 …
85Sago Mine disaster — wikinewshas|three articles on the accident * * *The Sago Mine disaster was a coal mine explosion on January 2, 2006, in the Sago Mine (pronEng|ˈseɪgoʊ) in Sago, West Virginia, USA near the Upshur County seat of Buckhannon. The blast and ensuing… …
86Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
87Screw — This article is about the fastener. For other uses, see Screw (disambiguation). Screws come in a variety of shapes and sizes for different purposes. U.S. quarter coin (diameter 24 mm) shown for scale. A screw, or bolt, is a type of fastener… …
88Numerical control — CNC redirects here. For other uses, see CNC (disambiguation). A CNC Turning Center …
89National Iranian Oil Company — شركت ملّی نفت ايران Type Government owned Industry Petroleum industry Founded 1948 …
90List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …
