21. Actually, the elevator is powered by one of those newfangled electrical motors that have become so popular. 22. They built extensive electrical generation and distribution systems, one of the first large-scale uses of large electrical motors . 23. Cycle rickshaws used outside Asia often are mechanically more complex, having multiple electrical motors to provide additional power. 24. In 1900 the turbines started to drive electric generators to power the machines, which had individual electrical motors . 25. The mechanical energy input can be supplied by an electrical motor , or an internal combustion engine, for example. 26. Starting in the 1860s bellows were gradually replaced by wind turbines which were later directly connected to electrical motors . 27. "Paul David's electrical motor has nothing to do with the knowledge-intensive process of work in a service economy ." 28. This really caught on in the 1960s with the introduction of better electrical motors and the improvement of plastics. 29. Then came the tractors, first on railways then on tyres since 1933, with electrical motors first and later diesel engines. 30. He turned on the new switch, which indeed resulted in a grrrring electrical motor noise but no crunching disposal sound.
