Turbines may be powered by some (water-tube boilers).Logical formLearned from6 sentences. Engine may be powered.Logical formLearned from6 sentences. Palm may be powered.Logical formLearned from6 sentences. (Fuel cells) may be powered by hydrogen.Logical formLearned from6 sentences. Instruments may be powered.Logical formLearned from6 sentences. Galaxies may be powered by black holes.Logical formLearned from6 sentences. Machines may be powered.Logical formLearned from6 sentences. Equipment may be powered.Logical formLearned from6 sentences. An unit may be powered by a battery.Logical formLearned from6 sentences. A force may be powered.Logical formLearned from6 sentences. A mill may be powered by water.Logical formLearned from6 sentences. Buses may be powered by compressed natural gas.Logical formLearned from6 sentences. A (diesel engine) may be powered.Logical formLearned from6 sentences. Equipment may be powered.Logical formLearned from6 sentences. (Fuel cell vehicles) may be powered by hydrogen.Logical formLearned from6 sentences.