Taking natural thermo-potential difference as natural draft pressure is ambiguous in theory and not in accord with the actual condition of mines.

把自然热位差当做自然风压在理论上是模糊的，是不符合矿井实际情况的。

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This paper describes the design of a portable draft pressure tester and analyses its architecture and the working principle of its main module, and also discusses its accuracy.

本文介绍一种便携式微差压测试仪的设计，详细分析它的系统结构以及主要模块工作原理，并对它的精度进行讨论。

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Amplitude and phase of pressure fluctuation at the inlet of draft tube as well as the inner flow in draft tube are analyzed in detail.

详细分析了尾水管进口截面的压力脉动的幅值和相位，并对尾水管内的流动做了分析。

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The United Nations Security Council in New York has adjourned its debate on the crisis, saying it needs more time to discuss a draft resolution designed to put pressure on Israel to withdraw.

BBC: EU team meets Israeli leaders