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应广大读者要求,本刊开辟“冶金产品标准问答”栏目,就读者所提问题聘请专家作答,结论代表专家个人观点,欢迎企业标准化工作者参与研讨。
At the request of the readers, this issue opens up the column of Questions and Answers on Metallurgical Product Standards and invites experts to answer the questions raised by the readers. The conclusion represents the personal opinions of experts and welcomes the participation of enterprises’ standardization workers in the discussion.