| 摘要 |
A packing box is composed of a cover and a container, and a ridge connecting the cover and the container. The cover has a cap formed at a top thereof. A first step is formed under the cap and with an upper surface and a wall. Two notches are respectively defined in the cap at two corners to form two pressed portions on the upper surface. A first rim is formed around the first step. Two first triangular portions are respectively formed on the first rim at the corners. The container has a second step corresponding to the first step. A second rim is formed around the second step. Two second triangular portions are respectively formed on the second rim and corresponding to the first triangular portions.
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