GB/T 40341-2021深海油田钻采用高强韧合金结构钢棒标准
英文:High strength and toughness alloy structure steel bars for deep sea oil field drilling and exploiting GB/T 40341-2021...
英文:High strength and toughness alloy structure steel bars for deep sea oil field drilling and exploiting GB/T 40341-2021...