furnace drive
51Materials Science Laboratory — MSRR 1 (NASA) The Materials Science Laboratory (MSL) of the European Space Agency is a payload on board the International Space Station for materials science experiments in low gravity. It is installed in NASA s first Materials Science Research… …
52Soulé Steam Feed Works — U.S. Historic district Contributing property Mississippi Landmark …
53National Register of Historic Places listings in Clackamas County, Oregon — Location of Clackamas County in Oregon The following list includes all of the National Register of Historic Places listings in Clackamas County, Oregon, and offers brief descriptive information about each of them. The National Register of… …
54National Register of Historic Places listings in Northern Chester County, Pennsylvania — Location of Chester County in Pennsylvania …
55Air preheater — An air preheater or air heater is a general term to describe any device designed to heat air before another process (for example, combustion in a boiler) with the primary objective of increasing the thermal efficiency of the process. They may be… …
56Steel strike of 1919 — The Steel Strike of 1919 was an attempt by the weakened Amalgamated Association of Iron, Steel and Tin Workers (the AA) to organize the American steel industry in the wake of World War I. The strike began on September 22, 1919, and collapsed on… …
57hand 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… …
58petroleum refining — Introduction conversion of crude oil into useful products. History Distillation of kerosene and naphtha The refining of crude petroleum owes its origin to the successful drilling of the first oil well in Titusville, Pa., in 1859. Prior to… …
59Chinese industrialization — In the 1960s, about 60% of the Chinese labor force were employed in agriculture. The figure remained more or less constant throughout the early phase of industrialization between the 1960s and 1990s, but in view of the rapid population growth… …
60PID controller — A block diagram of a PID controller A proportional–integral–derivative controller (PID controller) is a generic control loop feedback mechanism (controller) widely used in industrial control systems – a PID is the most commonly used feedback… …
