 2014, Vol. 33 Issue (3): 647-647 DOI: |
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| CHEN Zhimin1，2 | |||
| (1. Key Laboratory of Road Bridge and Underground Engineering of Gansu Province，Lanzhou Jiaotong University，Lanzhou，Gansu 730070，China；2. School of Civil Engineering，Lanzhou Jiaotong University，Lanzhou，Gansu 730070，China) | |||
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