
SPECIFICATION FOR WROUGHT ALUMINIUM AND ALUMINIUM ALLOYS FOR GENERAL ENGINEERING PURPOSES - BARS, EXTRUDED ROUND TUBE AND SECTIONS
出版:British Standards Institution

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SPECIFICATION FOR WROUGHT ALUMINIUM AND ALUMINIUM ALLOYS FOR GENERAL ENGINEERING PURPOSES - BARS, EXTRUDED ROUND TUBE AND SECTIONS
出版:British Standards Institution
专家解读视频