
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