A、<span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-ascii-font-family: \'Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'">渗碳钢</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><p></p></span>
B、<span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-ascii-font-family: \'Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'">调质钢</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><p></p></span>
C、<span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-ascii-font-family: \'Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'">工具钢</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><p></p></span>
D、低合金高强度钢
A、<span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">渗碳钢</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><p></p></span>
B、<span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">调质钢</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><p></p></span>
C、<span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">工具钢</span><span lang="EN-US" style="mso-bidi-font-weight: bold"><p></p></span>