carbon arc welding
71Manhattan Project — This article is about the atomic bomb project. For other uses, see Manhattan Project (disambiguation). Manhattan District The Manhattan Project created the first nuclear bombs. The Trinity test …
72Deoxidized steel — is steel that has a certain degree of oxygen removed from the melt during the steelmaking process. There are four types, ranging from fully deoxidized to slightly deoxidized: killed, semi killed, capped, and rimmed.[1] Contents 1 Types 1.1 Killed …
73Phosgene — Not to be confused with phosphine, oxalyl chloride, or phosgene oxime. Phosgene[1] …
74Hydrogen embrittlement — (or hydrogen grooving) is the process by which various metals, most importantly high strength steel, become brittle and crack following exposure to hydrogen. Hydrogen cracking can pose an engineering problem especially in the context of a… …
75Ruthenium — (pronEng|ruːˈθiːniəm) is a chemical element that has the symbol Ru and atomic number 44. A rare transition metal of the platinum group of the periodic table, ruthenium is found associated with platinum ores and used as a catalyst in some platinum …
76Cerium — lanthanum ← cerium → praseodymium ↑ Ce ↓ Th …
77Ferrosilicon — Ferrosilicon, or ferrosilicium, is a ferroalloy an alloy of iron and silicon with between 15 and 90% silicon. It contains a high proportion of iron silicides. Its melting point is about 1200 °C to 1250 °C with a boiling point of 2355 °C. It also… …
78Artificial pacemaker — Cardiac resynchronization therapy and CRT (Cardiac Resynchronization Therapy) redirect here. For the device termed a CRT D, see Implanted cardiac resynchronization device. For other uses, see Pacemaker (disambiguation). A pacemaker, scale in… …
79acetylene — A colorless gas burned in combination with oxygen for oxyacetylene welding. Explosive, especially if used in welding with Flammable!gauge pressures over 15 psig (30 psig absolute). It has a garlic like odor. Tank sizes available are 10, 40, 75 …
80Water Fuel Museum — The Water Fuel Museum, also known as the Kentucky Water Fuel Museum, a self funded alternative energy museum located near downtown Lexington, Kentucky, opened at 1012 Manchester Street in the fall of 2005, and closed one year later.… …
