A non-volatile solid or semi-solid substance apt to be deposited by some petroleum products when stored for long periods or heated, and formed by…
| 单词 | θ216840 |
| 释义 | society > occupation and work > materials > derived or manufactured material > extracted or refined oil > [noun] > distilled or refined mineral oils > deposit formed by oxidation (1) gum1922 A non-volatile solid or semi-solid substance apt to be deposited by some petroleum products when stored for long periods or heated, and formed by… |
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