rel arch

• 斜筒形拱,实心板拱,筒形拱

rel arch的用法和样例：

例句

1. The box-shaped arch construction to Yilan-Mudanjiang Bridge in Harbin-Tongjiang Expressway is provided especially in big span moulding of the site and installation of tons.
   重点介绍了哈同公路依兰牡丹江大桥箱形拱的施工工艺及在箱形拱施工中大跨径现浇和大吨位安装的施工经验。