LUM Series Superfine Vertical Roller Grinding Mill
LUM Series Superfine Vertical Roller Grinding Mill

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  • camera obscura

    french jewish philosopher, mathematician, physicist and astronomer/astrologer levi ben gershon 1288–1344 also known as gersonides or leo de balneolis made several astronomical observations using a camera obscura with a jacob's staff, describing methods to measure the angular diameters of the sun, the moon and the bright planets venus and jupiter. he determined the eccentricity of the sun based on his observations of the summer and winter solstices in 1334.

  • torture during the algerian war of independence

    elements of both sides in the algerian war of independence—the french armed forces and the opposing algerian national liberation front fln —used deliberate torture during that conflict 1954–1962 , creating an ongoing public controversy. pierre vidal-naquet, a french historian, confessed that there were 'hundreds of thousands of instances of torture' by the french military in algeria.

  • chuck tingle

    chuck tingle is a pseudonymous author of primarily gay niche erotica. he self-publishes his works through amazon.com, primarily as ebooks, but also as paperbacks and audiobooks narrated by sam rand . tingle began his career by writing dinosaur erotica and expanded to stories based on unicorns, bigfoot, and various anthropomorphized objects and even concepts.

  • the doctor star trek: voyager

    the doctor, an emergency medical hologram mark i or emh for short , is a fictional character from the television series star trek: voyager, played by actor robert picardo.he is an artificial intelligence manifesting as a holographic projection, designed to act as a short-term supplement to the medical staff of a starship during emergency situations, but when the starship voyager is stranded .

  • power tool

    history. the lathe is the oldest power tool, being known to the ancient egyptians albeit in a hand-powered form . early industrial revolution-era factories had batteries of power tools driven by belts from overhead shafts.the prime power source was a water wheel or later a steam engine. the introduction of the electric motor and electric distribution networks in the 1880s made possible .

  • screen machine industries

    screen machine industries, inc. formerly known as ohio central steel co., was founded in 1966 originally as a steel fabricating and manufacturing business. screen machine industries is a manufacturer of portable rock crushers and screening plants for aggregate base , topsoil , compost and green waste materials located in the united states .

  • list of accidents and incidents involving military .

    aircraft terminology. information on aircraft gives the type, and if available, the serial number of the operator in italics, the constructors number, also known as the manufacturer's serial number c/n , exterior codes in apostrophes, nicknames if any in quotation marks, flight callsign in italics, and operating units.

  • public address system

    a public address system pa system is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment.it increases the apparent volume loudness of a human voice, musical instrument, or other acoustic sound source or recorded sound or music. pa systems are used in any public venue that requires that an announcer, performer, etc. be sufficiently audible at a .