feed drill
51drilling machinery — equipment used to drill holes in the ground for such activities as prospecting, well sinking (petroleum, natural gas, water, and salt), and scientific explorations. Drilling holes in rock to receive blasting charges is an operation in… …
52Tool wear — describes the gradual failure of cutting tools due to regular operation. It is a term often associated with tipped tools, tool bits, or drill bits that are used with machine tools.Types of wear include: * flank wear in which the portion of the… …
53pneumatic device — Any of various tools and instruments that generate and use compressed air. Examples include rock drills, pavement breakers, riveters, forging presses, paint sprayers, blast cleaners, and atomizers. Compressed air power is flexible, economical,… …
54Threading (manufacturing) — Threading is the process of creating a screw thread. More screw threads are produced each year than any other machine element.[1] There are many methods of generating threads, including subtractive methods (many kinds of thread cutting and… …
55coal 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… …
56M1 Garand — Rifle, Caliber .30, M1 M1 Garand with en bloc clips. Type Semi automatic rifle Place of origin …
57Lee-Enfield — This article is about the early twentieth century British rifle. For other uses, see Enfield rifle (disambiguation). Lee Enfield Short Magazine Lee Enfield No. 1 Mk. III Type …
58Roswell High School (Georgia) — Infobox Secondary School name = Roswell High School motto = A Tradition of Excellence type = Public school, secondary established = 1949 grades = 9 12 enrollment = 2,436 campus=suburban, convert|54|acre|km2|4|sp=us|lk=on faculty = 246 principal …
59Deepwater Horizon — This article is about the drilling rig. For the explosion and oil spill, see Deepwater Horizon (disambiguation). Deepwater Horizon semi submersible drilling rig. Career …
60M1 Garand rifle — Infobox Weapon name=Rifle, Caliber .30, M1 caption= origin=flag|United States type=Semi automatic rifle is ranged=yes service=1936–1963 used by=See Users wars=World War II, Korean War, Vietnam War (limited) designer=John C. Garand design… …
