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impermeable layer
agric. 不透层
earth.sc. 不透水层
el. 不透水膜［层］
eng.geol. 隔水层
met. 不渗透层; 不渗透透水层
tech. 不滲透层; 防渗层; 不透水膜
impermeable layer: 7 phrases in 4 subjects
Bridge construction1
Engineering geology4
Oil / petroleum1
Technology1

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