| 摘要 |
An ink cartridge includes a first wall having a first end and a second end opposite the first end, and a second wall connected to and perpendicular to the first wall. The ink cartridge also includes an ink supply portion positioned at the first wall adjacent to the second end of the first wall, and a protrusion extending a predetermined length from the second end of the first wall. Moreover, an angle between the protrusion and the second wall continuously is greater than 180 degrees throughout the predetermined length of the protrusion.
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