grade e separation junction立体交叉连接

grade-separation culvert立交地涵

grade-separation pavement立交路面

grade-separation立体交叉

Railway Grade-Separation Project铁路立体化工程计划

grade-separation-style structure立交桥式构造

high-grade coal separation equipment高档选煤设备

grade-separation disc static mixer立交盘静态混合器

large grade separation大型立交