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20#冷拔無縫鋼管

6*1-1.5-2.5

14*1.5-2.5-3

16*1.5-2.5-3

18*2-3-4-5

20*2-2.5-3-6

24*2.5-3-4-5-6

25*2.5-3-4-5-6

28*3-3.5-4-5-6

32*3.5-4-5-6-8

34*4-5-6-8

36*3.5-5-6-8

38*4.5-6-7-8-10

39*3.5-5-6-8

42*3.5-4-5-6-7-8-9-10

45*3.5-4-5-6-7-8-9-10

48*3.5-4-5-6-7-8-9-10

51*3.5-4-5-6-7-8-9-10

56*3.5-4-5-6-7-8-9-10

57*3.5-4-5-6-7-8-9-10

60*3.5-4-5-6-7-8-9-12-14

63*3.5-4.5-5-6-7-8-9-12-14

68*4-4.5-5.5-7-8-9-10-12-14-16