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中华人民共和国国家标准低温作业分级Ｃｌａｓｓｉｆｉｃａｔｉｏｎｏｆｗｏｒｋｓｉｎｃｏｌｄｅｎｖｉｒｏｎｍｅｎｔ１９９３－０６－１０批准（国家技术监督局）ＧＢ／Ｔ１４４４０－９３１９９４－０１－０１实施１主题内容与适用范围本标准规定了低温作业环境冷强度...
Classification of the People’s Republic of China National Standard Classification of low temperature operation Classification ofworksincoldenvironment1993-06-10 Approval (State Bureau of Technical Supervision) GB / T14440-931994-01-01 Implementation 1 Subject content and scope of application This standard specifies the cold work environment cold strength ...