Trademark:GR1GR2GR3GR5GR7GR9GR10
Manufactuer techniques:cold-rolling,welded
Condition:M
Administer standard:ASTM  B 337 338
Size:diameater*wth*L/mm
        5-110*1.0-4.5*2000-6000
        110-1.0-8*1000-2000
        150-400*1.0-20*500-300