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这样的桥下面的拱梁真的能承重吗?看起来只会加重向下的重量。学力学的给咱解说解说
w4b
(Watch for Beauty)
(#6328710@0)
Last Updated: 2010-10-20
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这样的桥下面的拱梁真的能承重吗?看起来只会加重向下的重量。学力学的给咱解说解说
-
w4b
(Watch for Beauty);
2010-10-20
{63}
(#6328710@0)
I think they are steel cables.
-
sailor
(Mountains&Ocean);
2010-10-20
(#6328763@0)
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