一方面是产品高端化。它早早切入核电用管、深海油气开采用管等高附加值领域，实现多项进口替代。这跟背后持续不断的研发投入直接相关。据统计，久立特材和中信特钢多年研发费用率均在4%左右，远高于普钢企业。
Feb. 26, 2026 at 12:24 p.m. PT
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