冷弯空心型钢是冷弯型钢中的一类重要产品，其通常包括圆管、方、矩形管以及按照特殊要求制作的异形管。
Cold-roll void forming sheet is an important product in cold-roll forming sheet, which usually includes pipe, square tube, rectangle tube and unusual tube made by special requirements.
工程实践证明，运用粘型钢技术加固预应力空心板，安全可靠，速度快，干扰小，效果好。
The practice proved that strengthen prestressed hollow by method of section-steel bonded, safe and reliable, low investment, fast and interference small, the effect was very good.
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