air trap
noun
Any of various devices for trapping air; especially one for preventing the escape of foul air from a sewer.
Origin
Late 18th century; earliest use found in Encyclopaedia Britannica.
| 单词 | air trap |
| 释义 | air trapnoun Any of various devices for trapping air; especially one for preventing the escape of foul air from a sewer. Origin |
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