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發(fā)布時間: 2024-6-5 16:32
正文摘要:1、SA387按所含的合金元素分為如下幾個等級: 級別公稱含鉻量,%公稱含鉬量,%20.500.50121.000.50111.250.5022,22L2.251.0021,21L3.001.0055.000.5099.001.00919.001.001.1 除21L、22L和91級外,每個級別的鋼板按 ... |
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