... . 4. Electrode-source, economical and practical, on-line can be repaired. 5. Rotary damage electrode deposition surfacing, easy ... of their work without any pollution. Produce no harmful gas, can be directly in their hands, eyes, as, solder-accurate ... . Heat-resistant. Corrosion resistance, and other physical attributes. Can be polished mirror. Pitting profiling and sculpture. frequency adjustment range ...