1. Find time for an operating and stopped working system alternating were divided into four treatment system, which is vary the period following 24 hours. , operate 3 hours stop 30 minutes, operate 3 hours stop 1 hour, and operate 3 hours stop 2 hours
1. Find time for an operating and stopped working systemalternating were divided into four treatment system, which is vary the period following 24 hours. ,operate 3 hours stop 30 minutes, operate 3 hours stop 1 hour, and operate 3 hours stop 2 hours