组合桁架由顶部条形桁架，环形桁架，内部条形桁架组成。顶部条形桁架顶部与

From the top truss bar truss, truss annular, internal stripe trusses. Top Top truss and vertical lift bar connected to the system, lifting the bottom of the lower annular truss, which must meet the length venues hanging point range and the top of the steel beam width requirements Astromesh; Astromesh top rail is provided, inside the annular inner truss bar guide rails extending within the space; internal truss bar top and bottom rails are disposed perpendicular to each other, and the bottom rail is connected to the imaging system, the imaging system may be either an internal extension rail lateral truss bottom bar (vertical) movement, but also the inner bar truss with longitudinal (lateral) movement.

The combined truss consists of the top bar truss, the ring truss, and the inner bar truss. The top bar truss is connected to the vertical lift system, the lower ring truss is hoisted at the bottom, the length of which meets the requirements of the steel beam suspension point range and the width of the ring truss at the top of the venue, and the inner bar truss can be moved within the inner space of the ring The top and bottom of the inner bar truss are set up with each vertical rail, the bottom rail is connected to the camera system, the camera system can extend the horizontal (vertical) movement of the bottom rail of the inner bar truss, and can move vertically (horizontal) with the internal bar truss. ...

The composite truss consists of top strip truss, ring truss and inner strip truss. The top of the top strip truss is connected with the vertical lifting system, and the bottom is used to lift the lower ring truss, whose length shall meet the requirements of the lifting point range of the steel beam at the top of the venue and the width of the ring truss; the top of the ring truss is provided with guide rails, and the inner strip truss can move along the guide rails within the scope of the ring internal space; the top and bottom of the inner strip truss are respectively provided with mutual vertical guide rails, and the bottom guide rails Connected with the camera system, the camera system can not only move horizontally (longitudinally) along the bottom guide rail of the inner strip truss, but also move longitudinally (transversely) together with the inner strip truss.