The leading enterprises in our country play a part of bridge and tie, but there still exist some problems.
我国的龙头企业发挥了一定的桥梁和纽带作用，但仍存在一些问题。
2
The class cadres is communication between the school and classes, teachers and students of the bridge and tie, they play down the situation, the top From the intermediary role.
班干部是沟通学校与班级、老师与同学的桥梁和纽带，他们起着上情下达，下情上传的中介作用。
3
The paper discusses the application of beret truss bearers in prestressed concrete process tie bar arch bridge construction after mechanical calculation.