key stratus

英 美
  • 关键层
  • key n.键;关键;钥匙;答案adj.关键的;主要的vt.键入;用钥匙锁上;为...调音
  • stratus n.层云
    1. Satisfying the sufficient mechanics condition for key stratum instability, a water inrush is likely to happen in the floor.
      当满足关键层失稳的充要力学条件时,承压水底板有可能发生失稳突水。