ferrous base metals
121Plasma arc welding — (PAW) is an arc welding process similar to gas tungsten arc welding (GTAW). The electric arc is formed between an electrode (which is usually but not always made of sintered tungsten) and the workpiece. The key difference from GTAW is that in PAW …
122Song Yingxing — (Traditional Chinese:宋應星; Simplified Chinese:宋应星; Wade Giles: Sung Ying Hsing; 1587 1666 AD) was a Chinese scientist and encyclopedist who lived during the late Ming Dynasty (1368 1644). He was the author of an encyclopedia that covered a wide… …
123Olya — For the female name of which Olya is a diminutive, see Olga (name). Olya (English) Оля (Russian) …
124zinc processing — Introduction preparation of the ore for use in various products. Zinc (Zn) is a metallic element of hexagonal close packed (hcp) crystal structure and a density of 7.13 grams per cubic centimetre. It has only moderate hardness and can …
125Bulgaria — Infobox Country native name = bg. Република България bg. Republika Balgaria This article uses the official Bulgarian transliteration system when romanizing Bulgarian Cyrillic. For details, see Romanization of Bulgarian.] local name = bg. Balgaria …
126Economy of Ukraine — The economy of Ukraine is an emerging free market, with a gross domestic product that has experienced rapid growth in recent years. Ukraine s economy is ranked 33rd in the world according to 2007 GDP (PPP).cite… …
127Vladivostok — Infobox Russian city EnglishName=Vladivostok RussianName=Владивосток Skyline=Vladivostok harbor.jpg Skyline Golden Horn Bay LatDeg=43 LatMin=8 LatSec LonDeg=131 LonMin=54 LonSec LocatorMap LocatorMapLegend Flag CityDay=First Sunday of July… …
128Concrete recycling — When structures made of concrete are demolished or renovated, concrete recycling is an increasingly common method of utilizing the rubble. Concrete was once routinely trucked to landfills for disposal, but recycling has a number of benefits that… …
