| 单词 |
trench duct |
| 释义 |
trench duct trench duct[′trench ‚dəkt] (civil engineering) A metal-lined trough set into a concrete floor with removable cover plates that are level with the top of the floor; used to house electrical connections. trench duct  trench duct A metal trough buried in a concrete floor and having removable cover plates that are level with the top of the floor; used to carry electric conductors. |
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