welding furnace
31Wrought iron — is commercially pure iron. In contrast to steel, it has a very low carbon content. It is a fibrous material due to the slag inclusions (a normal constituent). This is also what gives it a grain resembling wood, which is visible when it is etched… …
32Rivet — A rivet is a mechanical fastener. Before it is installed it consists of a smooth cylindrical shaft with a head on one end. The end opposite the head is called the buck tail. On installation the rivet is placed in a pre drilled hole. Then the tail …
33automation — /aw teuh may sheuhn/, n. 1. the technique, method, or system of operating or controlling a process by highly automatic means, as by electronic devices, reducing human intervention to a minimum. 2. a mechanical device, operated electronically,… …
34Business 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… …
35Crucible steel — Iron alloy phases Ferrite (α iron, δ iron) Austenite (γ iron) Pearlite (88% ferrite, 12% cementite) …
36Coal — Sedimentary Rock Anthracite coal Composition Primary carbon Secondary hydrogen, sulfur …
37Space manufacturing — is the production of manufactured goods in an environment outside a planetary atmosphere. Typically this includes conditions of microgravity and hard vacuum.Manufacturing in space has several potential advantages over Earth based industry.# The… …
38Boilermaker — A boilermaker is a trained craftsman who produces steel fabrications from plates and sections. The name originated from craftsmen who would fabricate boilers, but they may work on projects as diverse as bridges to blast furnaces to the… …
39Oxyhydrogen — Knallgas redirects here. For bacteria which oxidize hydrogen, see Knallgas bacteria. Nineteenth century electrolytic cell for producing oxyhydrogen. Oxyhydrogen is a mixture of hydrogen (H2) and oxygen (O2) gases, typically in a 2:1 molar ratio,… …
40List of characters in the Alien series — This article lists characters and actors in the Alien series of science fiction films. The series spans four films: Alien (1979), Aliens (1986), Alien 3 (1992), and Alien Resurrection (1997). The only recurring actress in all four films is… …
