| 摘要 |
In a recording tape cartridge, a top case half and a bottom case half are combined through at least three combinations of a boss and a boss receiving hole two of which are disposed at the front or rear corners of the tape cartridge and one of which is disposed at the central portion of the side opposite to the side on which said two combinations are disposed so that the three combinations are in a triangular relation, whereby the mechanical strength of the cartridge case can be improved and the recording tape advance can be stabilized.
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