Downhold motor cooling and protection system
Downhole acoustic transducer
Downhole apparatus for absorbing vibratory energy to generate el
Downhole oil well vibrating system
Downhole oil well vibrating system
Downhole oil well vibrating system
Downhole torque generator
Downhole torque-generating and generator combination apparatus
Drag modification piezoelectric panels
Drain assembly for an electric motor
Drain cover for yoke of dynamic electric machine
Drain unit of starter
Drainage structure of fan motor
Draining device for a rotating electric machine
Draining device for a starter
Drilling implement
Drip cover for floor polishing machine
Drip-proof structure for engine generator
Drip-proof type electrical rotating machine
Drive apparatus