... over 20% electric energy than traditional models;2) The arcuate-bevel gear is made of chromium-manganese- ... oil leakage.4) Inside protectors are available to avoid the motor being accidentally burnt out;5) PE floats, nylon ... 1.9kg (O2)/h, 36.3% higher than the standard, power efficiency is 1.25kg (O2)/kWh, ... 36.8% higher than the standard, Outer packing, Carton. Pictures of paddle wheel ...