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