standard hoisting rope

例句：

1. 1. The standard for measuring the length of a ruler is 20 cm.
   测量尺子长度的标准是20厘米。
2. 2.The company has adopted a standard operating procedure to ensure quality control.
   该公司已采用标准操作程序以确保质量控制。
3. 3.The standard deviation measures how spread out the data points are from the mean.
   标准差衡量数据点与均值的距离。