pulley system造句怎么写
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Flexor tendon lacerations have historically not been repaired by emergency providers due to the extensive pulley systems involved and possibility of loss of mobility from scarring.
Why It's Innovative: Instead of separating in the middle like a drawbridge, the Pont Gustave-Flaubert's deck is lifted straight up by a butterfly-shaped pulley system so tall ships can pass through.
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