Old Chemistry and Metallurgy. Free from corrosive salt, sulphur, acid, etc. In modern use also in the Oil Industry, of petroleum or natural gas…
| 单词 | θ215502 |
| 释义 | society > occupation and work > materials > raw material > mineral material > mineral oil > [adjective] > type of mineral oil (2) sweet1919 Old Chemistry and Metallurgy. Free from corrosive salt, sulphur, acid, etc. In modern use also in the Oil Industry, of petroleum or natural gas… multigrade1959 Of engine oil: meeting the specification of several standard grades through having a viscosity that varies less with temperature than ordinary oil. |
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