必须注意的是，我们在这里讨论的操作点存在一个前提条件，那就是由其调控的对象是矩形，或者容易被矩形包围。
Notice that the assumption in this discussion of handles is that the object in question is rectangular or can be easily bounded by a rectangle.
所有蒸汽阀等操作部件均采用人性化设计，方便操作调控。
All the operating parts like steam valves etc. adopt the humanization design, in order to facilitate actual operations.
解决这些问题，要从心理学的角度分析其产生的原因，提出具有实际操作意义的调控方法。
The problem must be solved by analyzing the cause of it from psychology and putting forward adjusting methods with practical operation.
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