1) sealing
封洞
1.
To complete the task of adjusting house,remodeling of sealing in local area on top of 21st floor and remodeling of opening in partly floor on top of 22nd floor need to be done.
为完成复式住宅调整任务 ,需对 2 1层顶局部楼盖进行封洞改造 ,对 2 2层顶局部楼盖进行开洞改造。
2) water curtain grotto storage
水封洞库
1.
But the steel tank for storing gas, used for a hundred years, has not been apropos in dimension, cost and environment protection, so the underground water curtain grotto storage is emerged with practice.
本文重点论述地下水封洞库的保证性与围岩稳定性，同时还对我国修建地下气库的前景作了展望。
3) underground water-sealing oil storage in rock caverns
地下水封洞库
1.
The authors consider that proper site selection in construction of underground water-sealing oil storage in rock caverns is very important.
地下水封洞库是近年来国内兴起的一种新的储油方式,选择合适的库址是该工程非常重要的环节。
补充资料：洞洞惺惺
1.明彻清醒貌。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。