In the evaluation of steel pipe quality, the pipe appearance, the weld appearance, the pipe wall thickness, the defect types and sizes, and the pipe materials are selected as the evaluation factors.
在钢管质量评价过程中，选取了钢管外观、焊缝外观、管道壁厚、缺陷种类及尺寸、管道材料作为评价因素集。
The authors analyse the existent matters for side wall skin of large & middle coach, and briefly introduce the improvement measures of the appearance quality of the outer panel skin of Yaxing coach.
分析大中型客车侧围蒙皮存在的问题，简要介绍亚星公路客车侧围蒙皮外观质量的改进措施。
应用推荐