油气回收装置PLC控制程序。控制两台压缩机组，三个电控两位三通阀门，4个电磁阀，1个变频器，4路温度采集，2路压力采集。-Oil recovery PLC control program. Control of two compressors, three electrically controlled two-way valve, 4 solenoid valve, an inverter, 4-channel temperature acquisition, 2-way pressure a