$ 0 0 h1 (mm) s1 (mm) 2 R 4 ± 0.5 16 ± 0.2 13.0 7.0 35 ± 0.5 1.0 ± 0.04 4 R 6 ± 0.5 16 ± 0.2 13.0 7.0 45 ± 0.5 1.0 ±