... for food, drink, tea, glasswork, handiwork, sanitaryware, cosmetics, electronic products and so on. Feature: 1. The set comprises a plastic ... cleaning the screw and the residual material in each channel after machine halt can be prevented. As for the normal ... the machine barrel are made of superior alloy steel- 38CrMoAL. After finish machining, the parts are hardened through nitrogen treatment, so ...