The 11^th Iran Plas was successfully concluded at the World Trade Center in Tehran on Sep. 27^th 2017. WalthMac was invited to participate in this exhibition. During the exhibition,GMS gravimetric control system became highlight of the industry with exquisite appearance and superb technology. Ingenuious design, precision control accuracy and high system stability attracted a large number of visitors to watch and consult. After professional technical guidance and process optimization from WalthMac , many visitors are satisfied with solution having technical difficulties in processing. Besides they have cooperation intention.