An evacuated tube or pipe, esp. one along which vehicles or other objects can be propelled by allowing air to enter behind them.
| 单词 | θ202572 |
| 释义 | society > travel > means of travel > a conveyance > other means of conveyance > [noun] > evacuated tube or pipe (1) vacuum tube1784 An evacuated tube or pipe, esp. one along which vehicles or other objects can be propelled by allowing air to enter behind them. |
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