“航道导标”的概念、定义、翻译、参考文献-科学参考

单词	航道导标
释义	航道导标 Encyclopedia 工学水运交通指示释 navigation mark航道导标由前后两座标志所构成的导线标示航道的方向的水上助航标志。指示船舶沿该导线标示的航道航行。
随便看	principal sphere of curvature principal square root principals' research leadership principal state model principal state of polarization principal's teaching leadership principal strain principal subgroup principal subgroup series principal submatrix principal submodule principal subspace principal surface principal symbol principal symbol sequence principal system principal tangent principal tangent bundle principal telescope principal term principal theorem principal trace principal translation principal two-sided ideal principal type

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。