This paper introduces the actual operating course of the truss hoisting with herringbone rotating longeron supported by concrete frame. 介绍了利用砼框架支撑人字转动桅杆吊装桁架的实际操作过程。
In aircraft and launch vehicle construction, a Longeron, or stringer or stiffener, is a thin strip of material to which the skin of an aircraft or propellant tank may be fastened.