腿状物被设定尺寸，这样它们不会与接合处末端交迭，并因此提供了邻近接合处的缝合环的更好的视野。
The legs are sized so that they do not overlap the commissure tips and therefore afford a better view of the sewing ring adjacent the commissures.
腿状物被设定尺寸，这样它们不会与接合处末端交迭，并因此提供了邻近接合处的缝合环的更好的视野。
The legs are sized so that they do not overlap the commissure tips and therefore afford a better view of the sewing ring adjacent the commissures.
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