The sealing and drive mechanism performance of the sampling device are examined in accordance with the transient pressure zero balance method and in combination with the field practice.
按照等速采样的瞬时压力零点平衡法，结合现场应用实践，检验了采样装置的密封和传动机构性能。
Solved the problem of high pressure water rotary seals with the method of pressure balance, conducted the seals simulation experiments successfully.
利用压力平衡的方法解决了高压动密封问题，成功进行了密封试验。
On the basis of the material balance equation, this paper develops a method to predict the formation pressure using cumulative production data for normal pressure confined gas reservoir.
以正常压力系统封闭气藏的物质平衡方程序为基础，建立一种利用累积产气量计算气藏地层压力的方法。
The earth pressure balance shield is the main method of constructing the shield tunnel in the soft soil area.
土压平衡盾构是软土地区地铁隧道施工的主要方法之一。
The earth pressure balance shield is the main method of constructing the shield tunnel in the soft soil area.
土压平衡盾构是软土地区地铁隧道施工的主要方法之一。
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