With describing the cascade refrigeration technique, the mixing refrigeration technique, and the expanding refrigeration technique, the working principle of the above 3 LNG plants is introduced.
在简述阶式制冷工艺、混合制冷工艺和膨胀制冷工艺的基础上，介绍了上述3套国内液化天然气工厂的工艺原理。
Introducing American haas production line, the technique is in the domestic leading position in China is refrigeration equipment production and export important base.
引进美国哈斯生产线，技术处于国内领先地位，是我国制冷设备生产和出口的重要基地。
Based on the thermoelectric refrigeration principle and PID parameter self-tuning control technique, a temperature controller for semiconductor laser's environment test is designed.
基于热电制冷原理和PID参数自整定理论，本论文设计了一种半导体激光器环境的温度控制仪。
Based on the thermoelectric refrigeration principle and PID parameter self-tuning control technique, a temperature controller for semiconductor laser's environment test is designed.
基于热电制冷原理和PID参数自整定理论，本论文设计了一种半导体激光器环境的温度控制仪。
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