BS 1474-1987 Wrought aluminium and aluminium alloys for general engineering purposes bars, extrudedBS 1474-1987 Wrought aluminium and aluminium alloys for general engineering purposes bars, extruded round tubes and sections
部份国外标准涉及版权问题,所以全部国外标准于2013年02月,全部删除!相关页面仅提供参考消息。