短语词组短语reinforcing landslide -mass 滑坡体加固landslide geological mass 滑坡地质体landslide -mass flow deposit 崩塌lower landslide -mass 下滑体apper landslide -mass 上滑体landslide rock mass 滑移岩石rockfall and landslide mass 崩塌与滑坡体 返回 landslide mass