灰度同心层
multiple intensity layers
偏心同轴线
off-centre coaxial transmission line
Offset coaxial line
同心同向
reverse tangential firing system
形心同心圆
Shape-center concentric circles
高精度偏心斜孔
High-precision eccentric slant-hole
隔震层刚度偏心
stiffness eccentricity in isolation layer