Secondly, the paper discusses the main functions of the temporary road system, advances the feasibility and necessity of optimum design.
其次论述临时路面系统的主要功能，提出优化设计的可行性和必要性。
Secondly, the paper discusses the main functions of the temporary road system, advances the feasibility and necessity of optimum design.
其次论述临时路面系统的主要功能，提出优化设计的可行性和必要性。
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