
Safety rules for the construction and installation of lifts - Examinations and tests Part 50: Design rules, calculations, examinations and tests of lift components
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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Safety rules for the construction and installation of lifts - Examinations and tests Part 50: Design rules, calculations, examinations and tests of lift components
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频