|
US3336220A
|
|
Method of and apparatus for treating sewage containing biologically decomposable organic matter
|
|
US3113734A
|
|
Apparatus for comminuting fibrous material
|
|
US3120353A
|
|
Rotary slurry pump
|
|
US3067960A
|
|
Pumping and comminuting machine
|
|
US3060862A
|
|
Rotary pump with oblique rotor
|
|
US3005597A
|
|
Pump for fluids containing solids
|
|
US2956503A
|
|
Rotary pumps, particularly for delivery of sewage, thick slurries and the like liquids
|
|
US2347213A
|
|
Pneumatic device for raising and conveying semi solids
|
|
US1901817A
|
|
Compressor
|
