... -priming. It adopts forward-type groove with novel structure, double-vane water turbine, diversion kerb tube and dummy bottom device, mine in ... flotation. It uses deep-type rotor, shapes like stars, the vane gets radial symmetry and the stator is canister. It adds ... setting abackward blade with a double down the hammer-shaped impeller, and setting an air distributorin the centerof rotor,so it ...