accurate grinding
51Computer-aided manufacturing — CAD model and CNC machined part Computer aided manufacturing (CAM) is the use of computer software to control machine tools and related machinery in the manufacturing of workpieces.[1] …
52Speeds and feeds — A line drawing showing some basic concepts of speeds and feeds in the context of lathe work. The angular velocity of the workpiece (rev/min) is called the spindle speed by machinists. Its tangential linear equivalent at the tool cutter interface… …
53Model military vehicle — Main article: Military model 1/35 scale T 34 tank model with a landscaped base …
54ice hockey — a game played on ice between two teams of six skaters each, the object being to score goals by shooting a puck into the opponents cage using a stick with a wooden blade set at an obtuse angle to the shaft. [1880 85] * * * Game played on an ice… …
55space exploration — Investigation of the universe beyond Earth s atmosphere by means of manned and unmanned spacecraft. Study of the use of rockets for spaceflight began early in the 20th century. Germany s research on rocket propulsion in the 1930s led to… …
56Lithic analysis — In archaeology, lithic analysis is the analysis of stone tools and other chipped stone artifacts using basic scientific techniques. At its most basic level, lithic analyses involve an analysis of the artifact’s morphology, the measurement of… …
57Activities prohibited on Shabbat — Main article: Shabbat See also: Shomer Shabbat and Rabbinically prohibited activities of Shabbat The commandment to keep Shabbat as a day of rest is repeated many times in the Tanakh, the Hebrew Bible. (See for example Exodus 31:12 17 quoted …
58Gauge blocks — (also known as gage blocks, Johansson gauges, slip gauges, or Jo blocks) are precision ground and lapped measuring standards. They are used as references for the setting of measuring equipment such as micrometers, sine bars, dial indicators (when …
59Jig grinder — A jig grinder is a machine tool used for grinding complex shapes and holes where the highest degrees of accuracy and finish are required.The jig grinder is very similar to a jig borer, in that the table positioning and spindles are very accurate… …
60Science and inventions of Leonardo da Vinci — Infobox Artist name = Leonardo da Vinci imagesize = 200px caption = The Vitruvian Man by Leonardo is possibly the best known drawing in the world. birthname = Leonardo di Ser Piero birthdate = birth date|1452|4|15|mf=y flagicon|ITA Anchiano,… …
