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| DN508*40钢管理论重量是多少_DN508mm钢管厚度负偏差 |
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发布者：www.pipezx.com 发布时间：2013/11/25 阅读：3756次 【字体：大 中 小】 |
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DN508*40钢管理论重量是多少_DN508mm钢管厚度负偏差-北京北京石油裂化管价格
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377x20 |
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273x22 |
377x35 |
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273x32 |
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377x60 |
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219x48 |
273x45 |
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273x50 |
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406x40 |
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473*25 |
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