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| Harztest m; Teerprobe f (в остаточных цилиндровых маслах); Teertest m (в остаточных цилиндровых маслах) | |||
| Teerprobe f | |||
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| Gumtest (в нефтепродуктах) | |||
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определение содержания смол : 3 phrases in 1 subject |
| Oil / petroleum | 3 |
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