Figure 3
Scanning electronic microscopy images of new acupuncture and dry needles. (a) Type A1A, Type A2A, Type A3A, Type A4A: Acupuncture needles (magnification 400x); Type A1B, Type A2B, Type A3B, Type A4B: Acupuncture needles (magnification 2000x). (b) Type B1A, Type B2A, Type B3A, Type B4A: Dry needles (magnification 400x); Type B1B, Type B2B, Type B3B, Type B4B: Dry needles (magnification 2000x). (c) Type A1, Type A2, Type A3, Type A4: Acupuncture needle with transversal cut (magnification 500x, 1000x, 5000x, 10000x, respectively). (d) Type B1, Type B2, Type B3, Type B4: Acupuncture needle with transversal cut (magnification 500x, 1000x, 5000x, 10000x, respectively).
