1.The said extending guide pipe may be a hard pipe or hose with arbitrary shape, even may be a telescopic or a tressel structure.
同时外延反相道管可以是硬管或软管,形状可以任意设定,还可以做成拉杆结构和支架结构等。
2.Constructional technology of deep water basic bridge of tressel
栈桥深水基础桥梁施工技术