ratchet and pawl
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ratchet and pawl
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Ratcheting effect
rate constant
rate constant of reaction
rate gyroscope
Rate of climb
Rate of convergence
rate of discovery
rate theory
rate-determining step
Rating System
rat sarcoma
Raster Image Processor
Rarotonga
Rare-earth Ore
Rare-earth Mineral
Rare Sugar
rare species
rare plant
Rare earth resources
rare earth ore