| 摘要 |
A tape cassette for use with a video tape recorder having a counter mounted in the cassette to indicate to the user, or other concerned parties, the amount of time the material which is recorded on the magnetic tape within the cassette has been used. The counter can only operate when it is properly mated with a member on the VTR chassis and a ratchet and pawl mechanism in which indicia is printed on the ratchet.
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