The innovative design of the automatic gas pipe effectively reduces the loss of water through evaporation and pumping to ensure that the valve can perform its best function.
独有自动气喉设计，能有效减低隔气内之水份被蒸发及抽干而失去防回流的功能。
2
On the basis of a large number of field data, the regression equations of displacement coefficient, down-hole power loss and surface efficiency for pumping wells are established.
本文以大量的现场测试数据为基础，建立了抽油机井排量系数、井下功率损失及地面效率的回归方程；
3
The test results show that the fluid properties of paste mixes may be described in Bingham plastic fluids and the pumping pressure loss can be predicted with the theory.