SIS SS 21 52 62-1980 Wrought copper alloys Brass Drawn rectangular bars Dimensions and tolerances《锻造铜合金 黄铜 冷拔方杆 尺寸和公差》.pdf

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SIS SS 21 53 31-1980 Wrought copper and copper alloys - Drawn square bars Dimensions and tolerances《锻造铜及铜合金 冷拔方杆 尺寸和公差》.pdf

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