| 摘要 |
A container box includes an outer box for receiving an inner box therein. Ribs are formed on an inner surface of the outer box, and extend in a fitting direction, and are gradually changing in height so that molds can be easily removed after the molding. The ribs includes the normally-inclined ribs gradually increasing in height in the fitting direction of the inner box, and the reversely-inclined ribs gradually decreasing in height in the fitting direction of the inner box.
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