safety cost rate的意思|示意

It is very important for improving drilling rate, reducing drilling cost and safety drilling to carry out drill stem failure analysis and prevention.

开展油田钻柱失效分析与预防对提高钻井速度、降低钻井成本及井下安全钻进具有重要意义。

There are series problems exist in the existing thick seam mining technology with large dip Angle, thus cause low extraction rate, poor safety and high cost.

现有的大倾角厚煤层开采技术存在着一系列问题，从而导致煤矿回采率低，安全性差，成本高。

The utility model has the advantages of simple structure, reliable working safety, low cost, convenient maintenance, and high punching rate.

本实用新型结构简单，工作安全可靠，成本低，维修方便，穿孔率高。

The success or not of the dewatering directly influences the rate of progress and cost of the project, even more on its safety.

降水成功与否直接影响到工程进度、费用甚至工程的安全，应引起高度重视。

This system reduces the cost of human resources and the experiment shows the missing rate of invaders detection is also reduced and the safety is increased.

实验结果表明，该系统降低了人力资源的消耗，且有效地降低了侵入者的漏报率，从而提高监控质量。