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seamless steel pipe for liquid service
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seamless steel pipe for liquid service
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工学
流体输送用无缝钢管
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seamless steel pipe for liquid service
流体输送用无缝钢管
管道运输流体所用的采用热成形工艺制作的不带焊缝的钢管。简称无缝钢管。
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office of the national leading group for promoting the development of the Yangtze River economic belt of China
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office space in single module
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official block-printed edition
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official communications between the parallel ministries or administrative offices
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更新时间:2026/1/12 16:06:08