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| 最小必要低限度厚度 | |||
| 最小厚度 | |||
| minimum thickness: 29 phrases in 7 subjects |
| Automobiles | 1 |
| Bridge construction | 2 |
| Compressors | 1 |
| Earth sciences | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Metallurgy | 4 |
| Technology | 19 |
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