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1·Flying - which represents the product groups trusses and trussing, Pipe battens, Air frames, Lighting Bridges.

吊挂-代表了桁架及桁架系统，灯杆，悬挂框架，灯桥。

2·The fourth part Study two kinds of new-type channel mode structure, namely the mode of monopolized shop and trussing up the mode of selling, analyse the structure characteristic of the channel.

第四部分研究了两种新型渠道模式结构，即专卖店模式和捆绑销售模式，分析渠道的结构特征。

(1)steel truss钢桁架

(1)space truss空间桁架

(1)roof truss屋架；屋顶架；支持屋顶的三角形桁架

(1)truss bridgen. [建]桁架桥

(1)truss girder构架梁

(1)space truss structure网架结构；风架结构