Mainly on the automatic control system for greenhouse design, on the temperature, humidity, light intensity of the principles and methods of measurement.

主要介绍了对温室大棚自动控制系统的设计。阐述了温度，湿度，光照强度的测量原理和方法。

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The new pressure switches with many advantages such as simple circuit and manufacturing technique, lower cost, can be used in measurement, alarm, control of pressure and temperature.

这种新型压力开关具有电路和制造工艺简单、成本低等优点，可应用于压力与温度的检测、报警和控制领域中。

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This paper discussed on how to improve the accuracy of coal true relative density measurement in temperature control, blank experiment, process control and enhancing management.

从温度控制、空白试验、操作过程和加强管理等方面，阐述了如何在煤的真相对密度的测试过程中提高测定的准确度。

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