A minimum of two safety switches must be installed on all progressive dies to probe for proper strip advancement and part out detection.

在扫数连续模中起码安置两个安定检测开关去检测料带是否精确送进以及产品是否脱落。

It is first raised that safety coefficient can be calculated by using the widths of yield zone and pillar, and the steps of designing the strip mining size are pro-posed.

首次提出了根据屈服带宽度和条带煤柱宽度来确定条带开采安全系数的方法，同时给出了设计条带开采尺寸的步聚。

The roof shape optimization is one of the important means to control the ground pressure. A long strip of exposed roof surface shape can improve productivity of the stope and ensure mining safety.

优化采场顶板暴露面积形状是控制地压的重要手段之一，采用长条形顶板暴露面，能提高采场生产能力和保证回采的安全性。

Ultimate load designs according to the yield-line or strip methods do not guarantee safety against cracking or excessive deformation.

接屈服线法或条带法的极限荷载设计不能完全保证抗裂或防止过度变形。

As the key component of rolling machinery, the quality of oil-film bearing has great influence on the safety operation of rolling mill and the quality of strip and wire steel.

轧机油膜轴承作为轧钢机械的核心部件，其质量关系到轧机的安全运行并影响着板材质量。