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  1. Principles of the Transistor, The (1957 Film)

    Subject
    Engineering
    Distribution
    Film (16mm)

    Early use of crystals; working principles of the germanium diode and the transistor; applications and advantages.

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  2. Friction Welding at Work (1976 Video)

    Subject
    Engineering; Technology
    Distribution
    out of distribution, Videocassette. U-matic, VHS. col. 17 min., 2000 sale: £75.00 (+VAT +p&p)

    Using high-speed photography, explains the basic principle of friction welding in detail and shows several production examples. The industrial applications range from automobile parts, chemical plant,...

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  3. Chemical Equations in the Real World (2009)

    Subject
    Chemistry
    Distribution
    Sale, DVD (Region 0 PAL, 17 minutes), £39.00

    Suitable for KS3/4 students, this (2009) chapterised DVD looks at the chemical processes and chemical equations behind the manufacture and/or use of five common products in everyday use: · Soap - made from...

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