标准体积管的环管 prover loop
核能的环境管理 environmental management of nuclear energy
有效益的环境管理 PREMA
闭环式的管理体系 closed-loop management system
加强对环境的管理 Enhance environmental management ; Strengthening environmental management
全球环境的管理经济学 management economics in global environment
环球环境的战略管理 Strategic Management in the Global Environment
带调整环的溢流管 overflow pipes with adjustable rings
强化环境管理的政策 policy of tightening up environmental management
的环境管理信息系统 Environmental Management Information System
在套管或衬管与周围的水泥环之间所形成的小间隙，这些间隙是由于在固井期间或固井之后温度或压力的变化所致。
A small gap that can form between the casing or liner and the surrounding cement sheath, most commonly formed by variations in temperature or pressure during or after the cementing process.
浮鞋能够防止环空中的水泥浆向套管内流动这种回流或者U型管效应的发生。
The float shoe prevents reverse flow, or U-tubing, of cement slurry from the annulus into the casing.
采用考虑位移的土压力计算方法计算环向土压力，得出首节管道和后续管节最大土体反力的计算公式。
By considering displacement for calculating circular earth pressure, the maximal earth counterforce formulas for the heading and the latter pipelines are deduced.
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