高强度低合金焊接钢管和无缝钢管的英文

standard specification for high-strength low-alloy welded and seamless steel pipe

• 高强度:    high strength
• 低合金:    low-alloy; low con ...
• 焊接钢管:    welded steel pipe
• 和:    mix; blend
• 无缝钢管:    gapless rail; seam ...