对利用低温位热能来驱动的几种制冷装置性能进行了比较，以喷射式制冷为基础，以HCFC- 123为工质的制冷装置是比较理想的新型空调用制冷装置。
Through comparing on performance of some refrigeration drived by potential energy of low temperature. A new refrigeration based on jet compress with HCFC-123 is found.
第三，选用发动机电控系统传感器，设计了对应的信号处理电路和电控燃料喷射器电磁阀的驱动电路。
Third, the signal processing circuits were designed for the selected engine sensors and the drive circuit for the electromagnetic valve of electronically controlled injector.
第三，选用发动机电控系统传感器，设计了对应的信号处理电路和电控燃料喷射器电磁阀的驱动电路。
Third, the signal processing circuits were designed for the selected engine sensors and the drive circuit for the electromagnetic valve of electronically controlled injector.
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