navigable clearance 中文意思是什麼
navigable clearance
解釋
通航凈空-
Before the construction of bridge over navigable rivers, esp. on the reach of complicated topographical and flow conditions, factors such as bed evolution, bridge site ' s choice, clearance dimensions, navigation condition and safety - ensuring measures, etc. shall be studied
摘要在通航河流,尤其是在橋區地形、水流條件復雜河段處進行橋梁建設前,必須對河床演變、橋位、凈空尺度、通航條件和安全保障等因素進行論證。
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