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to phrases
gravel bed
ecol.
砾[石]层
hydroel.st.
砾石河床
;
卵石河床
oil
砾石层
tech.
砾石
垫
层
gravel bed
:
21 phrases
in 6 subjects
Desert science
1
Ecology
1
Metallurgy
1
Oil / petroleum
2
Technology
14
Water resources
2
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