YEOMANS

PUMPS FOR CONVEYING SOLIDS, LIQUIDS, SEMI-LIQUIDS, AND GASES, AND CONTROLS THEREFOR; CENTRIFUGAL PUMPS, AIR COMPRESSORS, GAS COMPRESSORS, BOOSTER PUMPS, VACUUM PUMPS, PNEUMATIC EJECTORS, STEAM OPERATED EJECTORS, GAS OPERATED EJECTORS; AND AERATORS, CLARIFIERS, SETTLING TANKS, SLUDGE COLLECTORS, AND DIGESTERS, AND COMBINATIONS THEREOF FOR THE TREATMENT OF SEWAGE AND OTHER MATERIALS