5083厚壁铝环 500X380X55
5083防锈铝管 450x350*60
5083防锈铝管 550X350*45
5083铝合金法兰500*380*55
5083锻造无缝铝管320X220X45
5083锻造铝法兰550X350*45
5083防锈铝管 600x450*70
5083无缝铝环 450x350*60
5083铝合金法兰550X350*45
5083锻造铝法兰600x450*70