9. Seamless steel pipe GB / T8162-1999, steel number: 10 #, 20 #, 35 #, 45 # at 16Mn (Q345), Specification: 6-720 * 1-70mm 10. Seamless steel pipe para sa conveying fluid GB / T8163-1999, numero ng bakal: 10 #, 20 #, 16Mn (Q345), Mga Pagtutukoy: 6-720 * 1-70mm 11. Low-medium pressure boiler tube GB3087...
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