| 单词 | dip-trap |
| 释义 | > as lemmasdip-trap dip-trap n. a drain trap formed by a dip or depression of the pipe in which water stands so as to prevent the upward passage of sewer-gas. ΚΠ 1883 F. de Chaumont Parkes's Man. Pract. Hygiene (ed. 6) i. x. 367 The common mason's or dip-trap..and the notorious D trap. < as lemmas |
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