| 摘要 |
An expansion box is used for an image forming apparatus including a main body part in which an image forming part is housed, and a sheet feeder cassette which is mounted to the main body part and in which sheets to be fed to the image forming part are contained. The expansion box is attached to the main body part, covers the sheet feeder cassette protruding from the main body part, and includes an opening through which a front part of the sheet feeder cassette is exposed. The image forming apparatus includes the main body part, the sheet feeder cassette and the expansion box. An assembly method of the image forming apparatus is also provided. The assembly method includes assemblage with attachment of the expansion box to the main body part and optionally a step of assemblage without attachment of the expansion box to the main body part.
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