| http://www.w3.org/ns/prov#value | - When it is desired to automatically extend the quill assembly 3 from the horizontal quill housing 4 in order to place a cutting tool, bit or other tool in the receiving end of the spindle 79, power is transmitted as hereinafter described from the rotating wormed power coupling 5, connected to the splined end of the spindle 79 and operated by an electric motor 100, located in the corresponding top
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