Where a railway crosses a navigablewaterway, a bridge must be built which is capable of being opened in order to allow the river or canal traffic to pass.
在铁路穿越航道，桥梁建立必需是可以被翻开，以使河流或运河流量通过。
2
Improving the navigable capability of waterway, it is necessary to study the changes of hydrodynamic condition and to predict the amount of sediment deposition in the dredged channel.
而疏深航道以提高通航能力，需要研究水域水动力变化并预测疏浚槽的回淤。
3
Article 3 the operations of domestic waterway transport are classified into the coastal transport and the inland-water transport on the basis of navigable areas.