NB T 47019.8-2021 锅炉、热交换器用管订货技术条件 第8部分：钛和钛合金.pdf

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NB T 47019.4-2021 锅炉、热交换器用管订货技术条件 第4部分 低温用低合金钢.pdf

NB T 47019.1-2021 锅炉、热交换器用管订货技术条件 第1部分 通则.pdf

NB T 47019.7-2021 锅炉、热交换器用管订货技术条件 第7部分 铜和铜合金.pdf

NB T 47019.9-2021 锅炉、热交换器用管订货技术条件 第9部分：镍和镍合金.pdf

NB T 47019.4-2021 锅炉、热交换器用管订货技术条件 第4部分：低温用低合金钢.pdf

NB T 47019.2-2021 锅炉、热交换器用管订货技术条件 第2部分：规定室温性能的非合金钢和合金钢.pdf

NB T 47019.5-2021 锅炉、热交换器用管订货技术条件 第5部分：不锈钢.pdf

NB T 47019.6-2021 锅炉、热交换器用管订货技术条件 第6部分：奥氏体-铁素体型双相不锈钢.pdf

NB T 47019.3-2021 锅炉、热交换器用管订货技术条件 第3部分：规定高温性能的非合金钢和合金钢.pdf

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