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pipe clay; terra alba |
制管土 : 64 phrases in 11 subjects |
Bridge construction | 4 |
China | 2 |
Earth sciences | 7 |
Ecology | 2 |
Electronics | 1 |
Engineering geology | 2 |
Hydroelectric power stations | 2 |
Name of organization | 1 |
Oil / petroleum | 1 |
Technology | 41 |
United Nations | 1 |