Control groups received fixed pressure CPAP.
对照组使用固定压力的CPAP。
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。
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。
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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