Abstract: An apparatus for fracturing polycrystalline silicon having a pair of rolls which are rotated in a counter direction each other around parallel axes; and a plurality of fracturing teeth which are provided on outer peripheral surfaces of the rolls and are protruded radially-outwardly, in which top surfaces thereof are formed spherically and side surfaces thereof are formed conically or cylindrically, and fracturing fragments of polycrystalline silicon between the rolls.

Abstract: An apparatus for fracturing polycrystalline silicon having a pair of rolls which are rotated in a counter direction each other around parallel axes; and a plurality of fracturing teeth which are provided on outer peripheral surfaces of the rolls and are protruded radially-outwardly, in which top surfaces thereof are formed spherically and side surfaces thereof are formed conically or cylindrically, and fracturing fragments of polycrystalline silicon between the rolls.

Abstract: A data recording apparatus which enables an individual like an author to record in a recording medium any data, such as a publication desired to be restricted on its copying, in the way that the copying can be restricted in an actually desired condition. A CPU, with respect to the data to be recorded input via an interface unit, compares copy control information input via an interface unit along with data and copy control information separately instructed by an operation panel, and uses the one having a higher restriction level as the copy control information of the data. Then, the CPU converts the input data into a format suitable to recording, generates recording data by adding additional information, such as determined copy control information, and records the same to a desired portion in a recording medium via a recording/reproducing unit.