目的研究胸腔闭式引流一次性水封瓶更换时间与胸腔感染是否相关，以确定更换一次性水封瓶的时间。
Objective To investigate the relation between the replacing time of water-sealed bottle and the thoracic cavity infections, and determine the optional time for replacement.
针对磷酸生产用水的特殊性，总结了大装置磷酸生产用水封闭循环使用存在的问题，并因地制宜地找到了解决此问题的方法。
This paper summarize the existing problems in the cycle use of process water for phosphoric acid production, and also some measures to solve were put forward.
目的探讨胸腔感染与一次性水封瓶更换时间长短的临床意义。
Objective To investigate the clinical significance between thoracic infections and the replacing time of one-off water seal bottle.
水封结构改进后，在线分析系统的稳定性、可靠性大为提高。
After the modification of the water seal structure, the stability and reliability of the online analytical system are substantially improved.
通过黄岛地下水封洞库工程实例具体分析了这种方法的优点，说明利用电视钻孔成像结果来研究渗透张量具有可行性。
The method is used in the project of Huangdao Water-Sealed Underground Oil Tank, and it has special superiority in the analysis of permeability tensors and is practical.
通过黄岛地下水封洞库工程实例具体分析了这种方法的优点，说明利用电视钻孔成像结果来研究渗透张量具有可行性。
The method is used in the project of Huangdao Water-Sealed Underground Oil Tank, and it has special superiority in the analysis of permeability tensors and is practical.
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