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undisturbed rock
 undisturbed rock
bridg.constr. 天然岩层
| mass
 mass
econ. 大众的
hydroel.st. 物质;
met. 大量
metrol. 质量的;
qual.cont. 连续体
tech. 质量

to phrases
undisturbed rock
bridg.constr. 天然岩层
tech. 原状基岩
undisturbed rock
: 1 phrase in 1 subject
Explosives and Explosive Ordnance Disposal1