a rail for conducting current to an electric locomotive or train
= conductor rail
[from its being third in addition to the two rails on which the wheels of a locomotive run]
| 单词 | third rail |
| 释义 | third railnouna rail for conducting current to an electric locomotive or train = conductor rail [from its being third in addition to the two rails on which the wheels of a locomotive run] |
| 随便看 |
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