Air suction machines; Back pressure valves as parts of machines; Butterfly valves being parts of machines; Centrifugal pumps; Compressed air pumps; Compressors for machines; Drain cocks; Hydraulic valve actuators; Mechanical seals; Mufflers for motors and engines; Pneumatic pumps; Pressure regulators being parts of machines; Pump control valves; Pump diaphragms; Pumps as parts of machines, motors and engines; Pumps for machines; Taps; Vacuum pumps; Valves being parts of machines; Valves for p...