216 Hu A 3x3 B x3 J-Cloth 4 7) . - 7 4.7 Hu 4 3-5 0 3 Mipor titanium 20 30 50 Mipor 10 24 0 2 1 0 0 03 1 58 26 03 87 73 86 78 0 6 (Guo ,