20200221A steel bar continuous casting and rolling system and a steel bar continuous casting and rolling production method

20200221A steel bar casting and rolling system and a steel bar casting and rolling method

20200428 Composite roller sleeve and roller

20200522 Roller sleeve, method for manufacturing roller sleeve, and roller

20210518A method for online alkaline blueing of hot-rolled steel bars

20210518A method for online acid blueing of hot-rolled steel bars

20220222 Composite blank preparation method and preparation device

20220415 Production method of stainless steel composite billet