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to phrases
天然地基
tiānrán dìjī
gen.
subsoil
bridg.constr.
natural subsoil
;
natural subgrade
eng.geol.
natural ground
hydroel.st.
natural foundation
;
natural base
tech.
untreated foundation
;
natural soil
天然地基
:
3 phrases
in 2 subjects
Agriculture
1
Technology
2
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