seam thickness
11Manchester Coalfield — The Manchester Coalfield is part of the South East Lancashire Coalfield. Its coal seams were laid down in the Carboniferous period and some easily accessible seams were worked on a small scale from the Middle Ages and extensively from the… …
12coal 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… …
13steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
14Wetsuit — This article is about the use of wetsuits in a range of water sports. For protective clothing specialized for scuba diving, see Diving suit. For the G.I. Joe character, see Wet Suit (G.I. Joe). Spring suit (shorty) and steamer (full suit) …
15Deck (ship) — For other uses, see Deck. A deck is a permanent covering over a compartment or a hull[1] of a ship. On a boat or ship, the primary deck is the horizontal structure which forms the roof for the hull, which both strengthens the hull and serves as… …
16Coal mining — Men leaving a UK colliery at the close of a shift Surface coal mining in Wyo …
17Coalbed methane — (CBM) or Coal Bed Methane[1], coalbed gas or coal mine methane (CMM) is a form of natural gas extracted from coal beds. In recent decades it has become an important source of energy in United States, Canada, and other countries. Australia has… …
18mining — /muy ning/, n. 1. the act, process, or industry of extracting ores, coal, etc., from mines. 2. the laying of explosive mines. [1250 1300; ME: undermining (walls in an attack); see MINE2, ING1] * * * I Excavation of materials from the Earth s… …
19Electric resistance welding — (ERW) refers to a group of welding processes such as spot and seam welding that produce coalescence of faying surfaces where heat to form the weld is generated by the electical reistance of material vs the time and the force used to hold the… …
20Pipe (fluid conveyance) — For structural pipe, see Hollow structural section. For other uses, see Pipe (disambiguation). Steel pipes …
