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凸凹形
desert.
convex concave
eng.geol.
convexo-concave
telecom.
convex-concave
凸 凹 形:
31 phrases
in 9 subjects
Architecture
3
Automobiles
1
Engineering geology
2
General
2
Hydroelectric power stations
1
Oil / petroleum
1
Polygraphy
1
Technology
14
Textile industry
6
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