seamless steel pipe
Size:10mm-630mm Material:10#-45# Q345A/B/C/D 40Cr 40CrMn 20CrMn 30Mn Executive Standard:GB8162 GB8163 GB3087-99 GB5310-95
seamless steel pipe
Size:10mm-630mm Material:10#-45# Q345A/B/C/D 40Cr 40CrMn 20CrMn 30Mn Executive Standard:GB8162 GB8163 GB3087-99 GB5310-95
seamless steel pipe