... roll-formed shape冷弯型钢 roll forming(冷弯型钢的)辊轧成型 roll fours四张(薄板)叠轧 ...
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Roll formed shape is an environmental protective building material with reasonable section shape, good mechanical property and high utilization of steel.
冷弯型钢是一种截面形状合理、力学性能良好、钢材利用率高的环保型建材。
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