| 摘要 |
A dishwasher is provided having a rotatable spray arm. The spray arm has a circular flange for rotatably mounting the spray arm to a hub. The flange has a varying vertical contour around the hub. Food particles that may become interposed between the flange and the hub can roll out from under the flange or can be broken down in size by an up and down action caused by the flange. 17
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