Dual frequency acoustic fluid flow method and apparatus

Dual function flow conditioner and check meter

Dual integral ballast flow sensor

Dual loop coriolis effect mass flowmeter

Dual loop coriolis effect mass flowmeter

Dual loop coriolis effect mass flowmeter

Dual loop Coriolis effect mass flowmeter

Dual magnetic drive for gear meters

Dual output vortex-shedding flowmeter having drag-actuated torsi

Dual purpose water meter cover

Dual revolving vane pump-motor-meter

Dual rotor flow meter

Dual S-loop single tube coriolis force flowmeter

Dual S-tube Coriolis force flowmeter

Dual sensor vortex flow meter

Dual wedge flow element

Dual windup drum extensional rheometer

Dual-body vortex-shedding flowmeter

Duplex sampling apparatus and method

Duplex ultrasonic imaging system with repetitive excitation of c