The device is tested thoroughly on different rolling aggregates, it has been working for about 4 years on the mill of hot ferrous metal rolling.
该仪器已在各种轧机设备上进行了全面试验，并已在黑金属热轧机上工作了4年。
The device is tested thoroughly on different rolling aggregates, it has been working for about 4 years on the mill of hot ferrous metal rolling.
该仪器已在各种轧机设备上进行了全面试验，并已在黑金属热轧机上工作了4年。
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