仪表及自动控制系统的水平是衡量工程技术水平的关键要素。
Instrumentation and automatic control system are the key elements to measure engineering technology level.
作者阐述了设计最优坡角的工程意义，并通过工程技术与成本诸要素分析，提出了最优坡角的确定方法。
The engineering signification for the best slope Angle is remarked in this paper. In view of factors of engineering technique and cost, the determinative method of the best slope Angle is provided.
作者阐述了设计最优坡角的工程意义，并通过工程技术与成本诸要素分析，提出了最优坡角的确定方法。
The engineering signification for the best slope Angle is remarked in this paper. In view of factors of engineering technique and cost, the determinative method of the best slope Angle is provided.
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