The upper sleeve is connected with the lower sleeve via a threaded tube.
上套管和下套管通过螺纹管连接在一起。
She put on her spectacles, threaded a needle, and stitch by stitch sewed up the rent in the sleeve.
她戴上眼镜，穿好针，然后一针一针地把衣袖上的裂缝补好。
She put on her spectacles, threaded a needle, and stitch by stitch sewed up the rent in the sleeve.
她戴上眼镜，穿好针，然后一针一针地把衣袖上的裂缝补好。
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