Principles involved in operation of photoelectric equipment; examples of outdoor and indoor applications to protection against sabotage or trespass, etc.


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    Title :

    Electric eye, invisible policeman


    Additional title:

    Petroleum World


    Contributors:
    Appel, R.E. (author)

    Published in:

    Publication date :

    1942


    Size :

    2 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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