шүүрэлтээс хамгаалах хөшиг
grout curtain
противофильтрационная завеса
One or more zones, usually thin, in the foundation into which grout is injected to reduce seepage under or around a dam.
Source Guidelines on Instrumentation on Large dams by Central Water Commission Ministry of Water Resources, River Development & Ganga Rejuvenation Government of India, June 2017, p.74Зураг