(in a spirit level) the vial or tube which contains the liquid and the bubble of air trapped in it.
| 单词 | θ212502 |
| 释义 | society > occupation and work > equipment > equipment for marking out work > [noun] > level > part of (2) bubble tube1812 (in a spirit level) the vial or tube which contains the liquid and the bubble of air trapped in it. level tube1890 = bubble tube n. at bubble, n. adj.compounds 2. |
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