- constant heading
- 不变: invariant
- 的: 4次方是 The fourth power of 2 i ...
- 航向: -方位指示器 course-and-bearing in ...
- 航向不变的: steady
- 不变的: abiding; changeless; constant; eternal; immovable; immutable - variable; inalterable; inconvertible; invariable; invariant; non variant; one; permanent; perpetual; persistent; same; standing; stationary; steadfast; steadystate; stedfast; unaffected; unalterable; unaltered; unchangeable; unchanged; uniform; unvarying
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