... and their stiffness, and cross stiffness, and so on (Deng, 20 07; 20 08b; 20 09b; He, 20 08; Jin, 20 08; Liu M., 20 08; Liu W., 20 08; Lu, 20 08; Ma, 20 08; Qin, 20 09; Wang J., 20 05a; 20 05c; 20 07; 20 09a; ... (N)Gap (mm) 20 0 2- 0 5 -2 8 No.1 No .2 No.3 No.4 No.5 No.6 No.7 No.8 10 20 30 40 500 20 0040006000800010000 120 00Levitation force (N)Gap (mm) 20 0 2- 0 5 -2 8 (a) (b) (c) Fig 9. (a) The measured ... further developing large sized vessel with thin walls that (a) (b) Fig. 1. Cross sectional view of the PMG iron → NdFeB -8 0 -6 0 -4 0 -2 0 0 20 40 60 80 -0 .8 -0 .6 -0 .4 -0 .2 0.00 .2 0.40.60.81.01 .2 B...