| 单词 | manhole door |
| 释义 | > as lemmasmanhole door manhole door n. ΚΠ 1844 H. Stephens Bk. of Farm II. 316 The man-hole door. 1881 Trans. Amer. Inst. Mining Engineers 1880–1 9 133 Flap-door, Newc., a manhole door. < as lemmas |
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