Control groups received fixed pressure CPAP.

对照组使用固定压力的CPAP。

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The utility model discloses a residual pressure and fixed pressure tester of rail circuit shunt, comprising a fixed pressure shunt fixture and a data display device.

本实用新型公开了一种轨道电路分路残压定压测试器。

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The anchor bolting has been widely applied in supporting structure of deep foundation pit in high building, and it maintains safety of protection structure with soil layer fixed pressure.

锚杆已广泛应用于高层建筑基坑的支护结构中，它利用地层的锚固力维持结构物的稳定。

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So what I'm doing here is I'm cooling, and then when I'm sitting at a fixed volume and I'm increasing the pressure, what am I doing? I'm heating, right?

对了，因此在这里，需要冷却,而在这里，当体积不变增加压强时？

麻省理工公开课 - 热力学与动力学课程节选

This is an example where the external pressure here is kept fixed as the volume changes, but it doesn't have to be kept fixed.

在我们举的这个例子中,外界压强不变，气体体积改变。

麻省理工公开课 - 热力学与动力学课程节选

But for any given store, falling revenue on a fixed cost base translates to significant pressure.

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Mr Kuchma is under growing pressure to get things fixed.

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Moreover, as investors chase stock returns, they are dumping fixed-income products, which will likely put pressure on interest rates.

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