
TECHNICAL DRAWINGS - GENERAL PRINCIPLES OF PRESENTATION - PART 50: BASIC CONVENTIONS FOR REPRESENTING AREAS ON CUTS AND SECTIONS
出版:German Institute for Standardisation (Deutsches Institut für Normung)

专家解读视频
TECHNICAL DRAWINGS - GENERAL PRINCIPLES OF PRESENTATION - PART 50: BASIC CONVENTIONS FOR REPRESENTING AREAS ON CUTS AND SECTIONS
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频