马钢二烧四大技改工程项目投产后，取得了丰硕的成果。
The MaSteel the second sinter factory four greatest skills change the engineering item hurl postnatal period, obtaining the plenteous result.
主要介绍了四大技改工程项目投产后为提高烧结矿质量所做的贡献。
This text introduced primarily four greatest skills changes engineering item hurl postnatal period as my factory mineral quantity a contribution for doing.
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