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piston rod guide : 79 phrases in 9 subjects |
| Automobiles | 6 |
| Chemistry | 1 |
| Compressors | 17 |
| Drilling | 6 |
| Metallurgy | 2 |
| Oil / petroleum | 4 |
| Rail transport | 1 |
| Shipbuilding | 2 |
| Technology | 40 |
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