Slope of counter-current flow rotary drier is in the range of ____________ meter/metre? March 2, 2019 – by admin Slope of counter-current flow rotary drier is in the range of ____________ meter/metre? A. 0 to 0.08 B. 0 to 0.8 C. 0 to 1.5 D. 0 to 2.2