Study on the characters of rock mass condition and the stability of surrounding rock has great practical significance to optimize design parameter and to advance construction quality.
走马岭隧道岩体结构特征和围岩稳定性研究，为优化设计参数，提高施工质量提供理论指导，对保证施工安全以及优化设计具有重要工程实践意义。
During the period of preliminary design and construction drawing design, the budget statement should be prepared respectively so as to optimize the cost estimate.
在初步设计、施工图设计阶段分别编制初步设计概算书和施工图设计预算书，进一步优化成本预算。
During the period of preliminary design and construction drawing design, the budget statement should be prepared respectively so as to optimize the cost estimate.
在初步设计、施工图设计阶段分别编制初步设计概算书和施工图设计预算书，进一步优化成本预算。
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