Based on practical situations, the article introduces the influence of different type fan to gas instantaneous water heater combustion thermal efficiency when heat load changes.
文章从实际情况出发，介绍了燃气快速热水器在热负荷变化时使用不同类型的风机对燃烧热效率的影响。
If the employee refers to any practical problems, the management staff must consider helping based on the actual situations of the company, and inform the employee of how things are dealt with.
如果该员工指出任何实际问题，管理人员必须在本公司实际情形的基础上考虑给予帮助，并随时通知员工事情是如何处理的。
Based on surveys of the current situations in practical teaching of Liberal Arts curriculum, the author points out the existent problems from five perspectives.
本文作者根据对当前文科课程实践教学实施情况的调查，指出现存五个方面的问题。
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