From the operational Cooperative Education in Nonthaburi, Thailand Post branches found the problem was with the many products would be wrong to reject its slopes. Since storage space is limited, Students learn concepts and theories optimized to work better by bringing technical thinking how to improve ECRS using the S is to simplify and control the visibility Visual Control to improve by. a sign that the separator material. Can help reduce errors in the separation and reduce the time it takes one minute to 30 seconds, down to 50% and crash down from five times to 2 times the figure is 60%.