正: the first month of the lunar ...火: fire及: reach; come up to回火: tempering; draw the temper; ...正火及回火钢: normalized and tempered steel淬火及回火: quenching and tempering淬火及回火状态: hardened & tempered strip/ precision quenched steel strip; hardened & tempered strip/ precision quenched steel strip; hardened &am tempered strip/ precision quenched steel strip正火淬火回火: normalizing-quenching-tempering正火回火处理: normalize tempering二次正火加回火钢: double normalized and tempered steel回火有低温回火及高温回火: low & high temperature tempering; low &am high temperature tempering正火: nbk; normalization; normalize; normalizing回火: 1.(金属的一种热处理工艺) tempering; draw the temper; drawing-back; letting down; drawing (俗称“配火”)2.(氧炔吹管等的火焰向反方向燃烧) flashback; flareback (常引起事故)◇回火爆炸 back draft; 回火处理 [工业] drawing temper; 回火脆性 temper brittleness; 回火度 degree of temper; 回火炉 tempering furnace及回应: reports and responses正火的: normalized正火钢: air hardening steel; normalized steel正火炉: normalizing furnace正火区: normalized zone重正火: renormalization防火及防烟: fire and smooke protection道歉及回答: making apologies and responding道谢及回答: expressing thanks and responding感谢及回应: thanking people and replying to thanks折让及回扣: allowance and rebats归一 正常化 正火 正火 常化: normalizing