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砾石砂
tech.
gravel sand
砾石砂
:
78 phrases
in 14 subjects
Architecture
2
Bridge construction
2
Desert science
3
Earth sciences
3
Ecology
1
Electronics
2
Engineering geology
2
General
3
Geology
4
Hydroelectric power stations
7
Mechanics
1
Oil / petroleum
21
Rail transport
2
Technology
25
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