culvert on steep grade是什么意思，culvert on steep grade的翻译，culvert on steep grade音标、读音、用法和例句

Warning: file_put_contents(): Only 0 of 4777 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/62383.com/index.php on line 55
culvert on steep grade是什么意思，culvert on steep grade的翻译，culvert on steep grade音标、读音、用法和例句_流逝汉英词典

culvert on steep grade

基本解释

专业释义

交通运输工程