通航

An interim goal was set to insure that all navigable waters would be fishable and swimmable by 1983.

而短期目标是到1983通航水域可以钓鱼和游泳。

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

软管水面穿越河流具有铺设迅速,检修方便,容易掌握和使用等优点,尤其是对于不通航河流,是软质机动管线临时穿越河流首选方式。

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).

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

With descending of the main pier s foundation slab and integral moving of pier,not only the navigable dimensions meet the demand,but also the influence on upbound ships is very li.

通过下降主墩承台及整体北移桥墩,使通航到要求,且对船舶上行影响极小。