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| high pressure boiler pipe :20# GB5310-1999 |
| chemical fertilizer pipe :20# 16Mn GB6479-86 |
| low-medium pressure bolier:20#16Mn GB3087-1999 |
| low-medium pressure bolier:20# 16Mn GB3087-1999 |
| high carbon seamless steel pipe for medicine making 35#45#50#27SiMn35CrMo40Cr |
| low carbon seamless steel pipe 10#15#20# |
| ship-building pipe 20#,16Mn |
| alloy seamless steel pipe 20Cr30Cr40Cr: |
Update Date:2011-10-24 0:20:46
boiler seamless pipe
