rock crown

A rock fragment suddenly fell from the crown of the tunnel and struck a worker to death.

突然一块碎石从隧道顶坠下，将一名工人击毙。

rock crown mini white skirt

水晶皇冠迷你裙低腰牛仔

The substitution of variable crown elevation tailrace tunnel for surge chamber not only can guarantee the safe operation of the powerplant and reduce the investment but also can avoid unfavorable influence of intensively distributed large span underground chambers on the stability of the surrounding rock mass.

用变顶高尾水洞取代调压室，既可保证电站的安全运行和减小工程投资，又避免了大跨度洞室群分布密集给围岩稳定带来的不利影响。

The ridgy rock, the woods that crown its steep.

参天的岩石, 山麓的树木.

The shock and vibration generated from the blasting operation caused a rock fragment to fall from the crown of the south bound tunnel and struck a worker to death.

爆石作业所产生的震动和振荡，导致一块碎石从南行隧道顶坠下，击死一名工人。