本实用新型坞壁车回转机构中，齿轮、齿条是在完全封闭的结构内运行，消除了安全隐患；
In the swing structure of the dock wall car, gear wheels and gear racks operates in a completely enclosed structure so that the potential safe hazard is eliminated;
在封闭式港坞以及水位稳定的港口里，码头的高度不能低于离水2.5米。
In closed docks or in ports with a stable water level, the quay surface should never be less than 2.5 meters above water level.
在封闭式港坞以及水位稳定的港口里，码头的高度不能低于离水2.5米。
In closed docks or in ports with a stable water level, the quay surface should never be less than 2.5 meters above water level.
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