I noted that for service identification, it is important to combine the three approaches of top-down, bottom-up, and cross-sectional, goal-model analysis.
我提到了，对于服务鉴别，自顶向下、自底向上和跨部分、目标模型分析三种手段的结合非常重要。
2
Statistical analysis for cross-sectional area ratios of chord and web members commonly used in steel roof trusses are also provided for reference in predictng fundamental calculation parameters.
对常用钢屋架的弦杆腹杆截面积比值作了统计分析，以便设计者能更准确地确定计算原始参数。
3
Some analysis on painting surface appearance, phase composition and cross-sectional structure also have been carried out by taking XRD and SEM.