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　　1. Blending precision: static state: 0.1%F.S dynamic state: 0.15%F.S
　　2. Mixing evenness of mixer: coefficient of variation ≤5%
　　3. Dust in workshop: ≤10mg/m3 Dust in workshop: ≤15mg/m ³
　　4. Computer record: batch, class, month production record (including raw material and match)
　　5. Computer blending system adopts IBM computer, Japan Mitsubishi PLC and transducer, American Toledo transducer, MCGS damping software dynamic mimic display
　　6. The different unit weight raw material adopts transducer speed control blending to guarantee actual blending precision is ≤0.15%