Warning: file_put_contents(/www/wwwroot/ppbbu/62383.com/cache/afcb0542ca8184ff022e0a195725c622.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/62383.com/index.php on line 55 longitudinal sleeper是什么意思，longitudinal sleeper的翻译，longitudinal sleeper音标、读音、用法和例句_流逝汉英词典
This paper mainly analyzes the cause and brings forward preventive measures of longitudinal crack from bolt hole of the sleeper. 本文主要對我國混凝土枕螺栓孔縱裂原因進行分析，提出侷部特殊混凝土改進的思路。