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rock mass
desert.	岩石层; 岩块
eng.geol.	岩體
expl.	岩体赋存于一定地质环境、含各类不连续面且具一定工程地质特征的岩石综合体
hydroel.st.	岩体
oil	岩块体

rock mass: 187 phrases in 10 subjects

Bridge construction	2
Desert science	1
Earth sciences	1
Ecology	1
Electronics	3
Engineering geology	14
Explosives and Explosive Ordnance Disposal	58
Hydroelectric power stations	22
Rail transport	5
Technology	80