... pressure test, Crystal rot test, Heat treatment, NDTChemical Composition of Material Composition Material201202304316430C≤0.15≤0.15≤0.08≤0.08≤0 ... drawings processing (threading, car ladder shaft, shaft end ring groove of punch, milling slot, the cars, radial drilling, etc)1. ... convenient transportation. We have two workshops for the production of plastic machinery and plastic products. We also have a ...