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回火发黑工艺国营水城钢铁公司贵阳弹簧铆钉厂（５５０００８）沈先治回火发黑工艺是目前国内推广的先进发黑工艺之一。我厂于１９９４年对减震器弹簧进行了生产性试验获得成功后，交付车间正式投入生产，共处理减震器簧２０ｔ左右，解决了我厂大批量生产减震簧的发黑问题...
Tempering black craft State-run Shuicheng Iron and Steel Company Guiyang spring rivets factory (550008) Shen first rule tempering blackening process is currently one of the advanced black technology to promote. After the success of the productive test on the shock absorber spring in 1994, the delivery workshop was formally put into production and handled a total of about 20t of the shock absorber spring, which solved the blackening problem of mass damper spring in our factory. .