| 单词 |
mine signal system |
| 释义 |
mine signal system mine signal system[′mīn ′sig·nəl ‚sis·təm] (mining engineering) Signal lights installed at individual track switches immediately indicating to the motorman whether or not it is safe to proceed. |
| 随便看 |
- kovalevskii's law
- kovalevskii, vladimir
- kovalevskii, vladimir onufrievich
- kovalevsky, alexander o
- kovalevsky, alexander o.
- kovalevsky canal
- kovalevsky sonya
- kovalevsky, sonya
- kovalev, viktor
- kovalev, viktor semenovich
- kovalik, sergei
- kovalik, sergei filippovich
- kovaliv, stepan
- kovaliv, stepan mikhailovich
- koval, marian
- koval, marian viktorovich
- kovalskaia, elizaveta
- kovalskaia, elizaveta nikolaevna
- kovalskii, aleksandr
- kovalskii, aleksandr alekseevich
- kovalskii, ivan
- kovalskii, ivan martynovich
- kovalskii, marian
- kovalskii, marian albertovich voitekhovich
- koval, vasilii
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