
FASTENERS - SURFACE DISCONTINUITIES - BOLTS, SCREWS AND STUDS SUBJECT FOR GENERAL REQUIREMENTS
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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FASTENERS - SURFACE DISCONTINUITIES - BOLTS, SCREWS AND STUDS SUBJECT FOR GENERAL REQUIREMENTS
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻