gas drainage rate

常见例句

These conclusions aid to measure drainage rate of gas and fixing on maintenance period of coal laneway.
这些结论对于检测煤层瓦斯抽放率以及合理确定煤巷的维护周期具有重要的参考价值。
This paper studies the purpose is to find a kind of efficient lies in the actual production of low permeability of feasible coal permeability gas drainage, thus improving the rate of new methods.
本论文研究的目的就是在于寻找一种高效率的，在实际生产中切实可行的提高低透气性煤层渗透率，从而提高瓦斯抽放率的新方法。
Drainage through the system out, so that exhaust gas purification rate of 98%, greatly purified the shop working environment.
通过该系统抽排出去，对尾气净化率达到98%、大大净化了车间工作环境。