A hole or opening in a floor, pavement, boiler, etc., through which a person may pass to gain access to a structure or mechanism for inspection…
单词 | θ102392 |
释义 | the world > space > relative position > condition of being open or not closed > an opening or aperture > [noun] > opening which may be passed through > through which a man may pass (1) manhole1769 A hole or opening in a floor, pavement, boiler, etc., through which a person may pass to gain access to a structure or mechanism for inspection… |
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