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不透水层 bùtòushuǐcéng
agric.	water-tight stratum
bridg.constr.	impervious layer impermeable layer; impermeable bar rier; impervious course; impermeable course; water-tight layer; impervious blanket
desert.	confining layer; confining stratum; imperious layer; impermeable seam; impermeable stratum; impervious horizon; watertight layer
earth.sc.	impermeable layer
ecol.	impervious floor
el.	impervious strata
eng.geol.	impermeable bed; impervious formation; water tight layer; waterproof stratum; watertight stratum
geol.	retainer
hydroel.st.	impervious bed; aquifuge; impervious layer; impermeable barrier; impervious stratum
oil	aquiclude
space	confining bed
tech.	barrier membrane; hardpan; impervious skin
不透水岩层
tech.	aquifuge; impermeable bed; impervious bed
不透水 矿层
eng.geol.	impermeable seam
不透水面层
tech.	impervious blanket
土壤不透水层 bùtòushuǐcéng
desert.	watertight stratum
不透水隔层
tech.	impermeable barrier

不透水层: 55 phrases in 7 subjects

Architecture	3
Bridge construction	8
Electronics	2
Engineering geology	10
Hydroelectric power stations	5
Metallurgy	1
Technology	26