| 摘要 |
A sewing machine body includes a base with an upright part connected to a top of an end of the base and an arm which is connected to a distal end of the upright part. Each of the base, the upright part and the arm includes a hollow interior which is defined by four sidewalls or three sidewalls. Four connection plates are respectively welded to the arm and the upright, and the upright part and the base. The welding seams of the connection plates and the arm and the base are parallel to the arm.
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