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| profilé creux; section en caisson | |||
| section carrée | |||
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| profilé en caisson | |||
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box- section : 22 phrases in 6 subjects |
| Agriculture | 4 |
| Construction | 3 |
| Materials science | 1 |
| Mechanic engineering | 7 |
| Metallurgy | 1 |
| Transport | 6 |
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