Nazdar has expanded its screen printing distribution within China which is already being serviced by Grace Screen Supplies Limited in Shenzhen, P.R.C. through the addition of Sam Wo International Printing Equipment, Ltd.      Sam Wo International, based in Shenzhen, is the P.R.C.’s leading supplier of screen printing equipment and supplies, currently operating 34 distribution centers supported by a network of sub-distributors, two technical service centers, a technical training center and a s...