position of welding
41Eastern span replacement of the San Francisco — San Francisco – Oakland Bay Bridge (eastern span replacement) Artistic rendition of the new eastern span of the Bay Bridge seen from Treasure Island (ca. 2014) Official name To be determ …
42Numerical control — CNC redirects here. For other uses, see CNC (disambiguation). A CNC Turning Center …
43Electron — For other uses, see Electron (disambiguation). Electron Experiments with a Crookes tube first demonstrated the particle nature of electrons. In this illustration, the profile of the cross shaped target is projected against the tube face at right… …
44Hydraulic machinery — are machines and tools which use fluid power to do work. Heavy equipment is a common example.In this type of machine, high pressure hydraulic fluid is transmitted throughout the machine to various hydraulic motors and hydraulic cylinders. The… …
45hand tool — any tool or implement designed for manual operation. * * * Introduction any of the implements used by craftsmen in manual operations, such as chopping, chiseling, sawing, filing, or forging. Complementary tools, often needed as auxiliaries to… …
46Business and Industry Review — ▪ 1999 Introduction Overview Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …
47spot — n. & v. n. 1 a a small part of the surface of a thing distinguished by colour, texture, etc., usu. round or less elongated than a streak or stripe (a blue tie with pink spots). b a small mark or stain. c a pimple. d a small circle or other shape… …
48building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …
49Churchill tank — Tank, Infantry, Mk IV (A22) Tank, Infantry Mk IV Churchill IV (75mm) Type Infantry tank Place of origin …
50Spring (device) — Helical or coil springs designed for tension Compression sp …
