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20號(hào)3087是什么材質(zhì)?無錫gb3087無縫鋼管63.5x3

gb3087無縫鋼管現(xiàn)貨規(guī)格

25×6

28×6

32×6-8

34×6-8

36×6-8

38×6-7-8-9-10

39×8-10

42×6-7-8-9-10

45×6-7-8-9

48×6-7-8-9-10

51×6-7-8-9-10

56×6-7-8-9-10

57×6-7-8-9-10-12

60×6-7-8-9-12-14

63.5×6-7-8-9-10-12-14