| 摘要 |
A writing implement that includes a writing body extending from an end; a writing tip integral with the writing body, and a removable cap that covers the writing tip in a coupled position of the cap with the writing body, the cap having a bottom, a tubular wall that extends along a central axis between a first end that joins with the bottom and a second end that defines an axial opening, the tubular wall has an inner surface on which protrusions are capable of holding the cap by engagement with the writing body in the coupled position, where the inner surface of the cap has at least one groove arranged between two of the protrusions and extends to the second end of the tubular wall. |
