为方便医疗、护理,提高工作效率,我院自制了一台自动控制中心吸引器,管道直通各病区,不要专人看管,每天24小时随时可用,电路比较简单,五年来工作正常,很受医护人员的欢迎。在自动控制系统(图1)中,P为上海压力表厂生产的电接点真空压力表,“2”为指针式动接点,“1”是固定接点,选定压力为 For the convenience of medical care, nursing, improve work efficiency, our hospital made an automatic control center aspirator, the pipeline through the ward, do not hand care, available 24 hours a day, the circuit is relatively simple, five years of work is normal, very medical Staff welcome. In the automatic control system (Figure 1), P is the pressure gauge of the electric contact produced by Shanghai Pressure Gauge Factory, “2” is the pointer type movable contact, “1” is the fixed contact, the selected pressure is