innavigable

Therefore, the water-surface crossing with mobile flexible pipelines is often adopted and it is a first choice to cross an innavigable river.

软水面穿越流具有铺设迅速,检修便,容易掌握和使用等优点,尤其是对于不通航流,是软质机临时穿越流的首选。

The technique of pier integral precasting at the sea was researched and applied in the innavigable section construction of Donghai Bridge(the first bridge at the sea in China).

上墩柱整体预制吊装在我国第一座外桥梁东大桥非通航段施工中得以研究和全面应用。