以下为句子列表：
英文: Move the feed dog up or down to perform adjustment, then securely tighten the screw.
中文: 上下移动送布牙调节高度，然后拧紧紧固螺丝。
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英文: Tilt of the feed dog can be adjusted with the procedure described below.
中文: 采用以下的方法可以调整送布牙的倾斜度。
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英文: Turn the vertical driving cam to the position where throat plate surface 3 and needle tip 4 align with each other, and the first or the second tooth of the top end of feed dog 5 descends from the throat plate surface.
中文: 让针尖4与针板上面3对齐，在送布牙5的前端1～2齿从针板上面下沉的位置，转动上下传送凸轮，进行固定。
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