| 摘要 |
Disclosed is a centrifugal liquid pump, preferably of the rotary disc type, which incorporates a gas injection assembly of very simp le yet efficient structure, whereby up to 15 % per volume of a gas such as air may be mixed with the pumped liquid. The gas injection i s achieved with a gas feed pipe (33) that enters the pump through its axial in let and with a plurality of gas injector pipes (41) that projects from the gas feed pipe radially within the impeller.
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