The packer sealing condition is valuated according to the variation of flow rate and pressure below injection flow regulator with injection pressure at the wellhead.
该技术是利用密封段密封配水器中心通道，通过改变井口注水压力来了解配水器以下的流量和压力的变化情况，判断封隔器密封状况。
This method is a variation of the discounted cash flow method that assumes some minimum desired rate of return.
此方法是贴现现金流方法(该方法假定了一个最小期望回报率)的一个变体。
The variation principles of the throw distance, flow rate and rotation speed of variable-rate sprinklers for precision irrigation on square area were given.
通过理论分析，给出方形喷洒域变量施水精确灌溉喷头的射程、流量和转速应服从的变化规律和计算公式。
应用推荐