Is the screw rusty as hard as the welding? Don't be afraid...

In July 2018, the national electrolytic aluminum operating capacity was 37.51 million tons, down 1.8% year-on-year; the July operating rate was 75.9%, compared with 81.5% in the same period last year; the January-July production was 21.2 million tons, down 2.4 from last year. %. The survey involved


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