Dual control flushing mecanism for complete or partial...
Dual control line system and method for operating surface...
Dual control mode lock system
Dual cutting mill
Dual cylinder dual pick-up coupler
Dual detection sensor system for washroom device
Dual digging tooth retainer pins
Dual directional downhole overpressure valve
Dual diverter and orientation device for multilateral...
Dual downhole injection system utilizing coiled tubing
Dual drop covering for architectural openings
Dual drum and rail window regulator drive system
Dual dynamic rotary seal
Dual fabric covering for architectural openings
Dual firing system for a perforating gun
Dual flapper barrier valve
Dual flush activation
Dual flush cistern
Dual flush cistern mechanism
Dual flush electronic flush valve