- axis of channel
- center of channel
- channel axis
- the middle line of the navigable channel
- 航道: channel; lane; course; passa ...
- 中心线: centre line; mean line; medi ...
- 主航道中心线: neutral line; talweg; thalweg
- 航道中心线浮标: mid-channel buoy
- 扫雷航道中心线: center line of mine-swept route
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