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tejp, duk, mattor, band,
mechanically controlled variable sequence manipulation mechanisms which are automated moving devices, operating according to mechanically fixed programmed motions. the programme is mechanically limited by fixed, but adjustable, stops, such as pins or cams. the sequence of motions and the selection of paths or angles are variable within the fixed programme pattern. variations or modifications of the programme pattern (e.g. changes of pins or exchanges of cams) in one or more motion axes are accomplished only through mechanical operations;