“The primary mirror is a technological marvel. The lightweight mirrors, coatings, actuators and mechanisms, electronics and thermal blankets when fully deployed form a single precise mirror that is truly remarkable,” said Lee Feinberg, optical telescope element manager for Webb at NASA's Goddard Space Flight Center in Greenbelt, Maryland.
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Presently, prosthetics rely on relatively heavy hydraulic, electric or pneumatic actuators to flex artificial fingers, but scientists at Germany's Saarland University are experimenting with much lighter fibers made of a nickel-titanium alloy that change shape when connected to a source of electricity.
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English example sentences with "actuators"