positioning screw
21French ship Napoléon (1850) — Le Napoléon was a 90 gun ship of the line of the French Navy, and the very first purpose built steam battleship in the world [ Napoleon (90 guns), the first purpose designed screw line of battleships , Steam, Steel and Shellfire , Conway s… …
22Wire wrap — This article deals with electronics manufacturing and prototyping techniques, see Wire wrap jewellery for the jewellery related topic Wire wrap is a technique for constructing small numbers of complex electronics assemblies. It is an alternative… …
23Derailleur gears — Transmission types Manual Sequential manual Non synchronous Preselector Automatic Manumatic Semi automatic Electrohydraulic Dual …
24Transmission electron microscopy — A TEM image of the polio virus. The polio virus is 30 nm in size.[1] Transmission electron microscopy (TEM) is a microscopy technique whereby a beam of electrons is transmitted through an ultra thin specimen, interacting with the specimen as it… …
25Numerical control — CNC redirects here. For other uses, see CNC (disambiguation). A CNC Turning Center …
26Magnetic base — as used in the engineering metaltrades. Fixed magnetic base with sna …
27Stepper motor — A stepper motor (or step motor) is a brushless, synchronous electric motor that can divide a full rotation into a large number of steps. The motor s position can be controlled precisely, without any feedback mechanism (see open loop control).… …
28Comparison of cricket and baseball — Cricket and baseball are the best known members of a family of related bat and ball games. While many of their rules, terminology, and strategies are similar, there are many differences some subtle, some major between the two games. Other present …
29Counterbore — A counterbore in a metal plate A counterbore can refer to a cylindrical flat bottomed hole, which enlarges another hole, or the tool used to create that feature. A spot face is a very shallow counterbore. A counterbore hole is used when a… …
30Mirror mount — This article is about the general subject. For mirror mounts specific to primary telescope mirrors, see Mirror support cell. Two kinematic mirror mounts, with mirrors. A mirror mount is a device that holds a mirror. In optics research, these can… …
