Liushi, across the Oujiang estuary from Wenzhou, accounts for 40% of the country's low-voltage electrical switches.

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Milwaukee made electrical switches.

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At Luna Park, where about 750 seasonal staff members are expected to work this summer, engineers replaced electrical boxes, wiring and switches for nearly all 21 rides.

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Before then automation controls amounted to electrical cabinets filled with banks of electromechanical switches.

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The latch works by running an electrical current down a signal wire, through two switches.

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GaN switches convert power at higher frequencies than traditional components and can be easily embedded in virtually any electrical system from consumer electronics products to computer servers, HVAC equipment, industrial motor drives, and inverters for solar panels and electric vehicles.

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