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第三部门：解脱困境的出路：—种可能的轨制变迁。
Part Three: A solution to the problems: a possible system change.
youdao
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钢轨轨底缺陷有三种：底伤、结疤和底裂缺陷。
Steel rail has 3 rail base defects: bottom defect, scab and bottom crack.
youdao
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钢轨轨底缺陷有三种：底伤、结疤和底裂缺陷。
Steel rail has 3 rail base defects: bottom defect, scab and bottom crack.
youdao