| 单词 |
impermeator |
| 释义 |
impermeator|ɪmˈpɜːmiːeɪtə(r)| [f. im-1 + late L. permeātor, agent-n. f. permeāre to permeate.] In a steam-engine, an appliance for forcing oil into the cylinder in order to lubricate uniformly the walls of the cylinder and the piston. In recent Dicts. |

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