temper carbon meaning in English

回火碳, 二次石墨
退火碳
因火碳

Oil tempered carbon steel spring wire and springs
油回火碳素钢弹簧钢丝和弹簧
Oil tempered carbon steel valve , spring quality wire , and springs
油回火碳素钢阀弹簧钢丝和弹簧
Standard specification for steel wire , oil - tempered carbon valve spring quality
阀簧级油回火碳素钢丝的标准规范
Standard specification for quenched - and - tempered carbon and high - strength low - alloy structural steel plates
淬火和回火的碳素钢和高强度低合金结构钢板的标准规范
Standard specification for quenched and tempered carbon and alloy steel forgings for pressure vessel components
压力容器部件用经淬火和回火的碳素钢及合金钢锻件的标准规范