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piping design | |||
pipeline design | |||
channel design; duct design; pipe design | |||
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duct design |
管道设 计 : 16 phrases in 8 subjects |
Earth sciences | 1 |
Ecology | 1 |
Oil / petroleum | 3 |
Oil processing plants | 1 |
Project management | 1 |
Refrigeration | 3 |
Technology | 5 |
Water resources | 1 |