Copolyester is specified as a lower-cost alternative to polycarbonate

摘要

The application is a child's "mobile entertainer"-a four-wheeled seat with a tray of toys-that helps kids learn to walk. A thoughtful feature on Graco's new model is a transparent tray, so the kid can see the floor glide past. Of course, the kids love to take the toys and pound on the tray.