隐形防护网专用膨胀镙丝，管壁加长加厚，中间镙杆突出更短方便施工，6X80规格常用于墙体不够结实批荡较厚的工地施工。

The expansion screw for invisible protective net is specially used, the pipe wall is lengthened and thickened, and the middle screw rod is protruded and shorter for convenient construction. 6x80 specification is commonly used in the construction site where the wall is not strong enough and thick.