缓倾角滑面滑坡
landslide of low dip slope
[空]气动力平滑面
aerodynamically smooth surface
层面剪切滑面
bedding-plane shear surface
超轻三角座滑架
ultra-lightweight carriages
短三角座滑架横机
short carriage knitting machine
多滑面块体
block with multiple sliding-planes
非圆弧滑面
the non-circular slip surface