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.
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.
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