青云翻译

40MnB is Mn, B as the basis instead of Cr, Ni low-alloy steel, of a structural steel

40MnB is based on a Mn, b instead of Cr, Ni steel for low-alloy structural steel

40MnB is take Mn, B as the foundation replaces Cr, the Ni steel one kind of low-alloy structural steel

40 MnB Mn , B is based in lieu of steel Ni Cr , a low alloy steel

40MnB is based on a Mn, b instead of Cr, Ni steel for low-alloy structural steel