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At the end of the 19th century, electric gates were also used at horse racing tracks. [5] The first commercial electric gate systems were hydraulic and designed for reliability and ease of use. The cost of the hydraulic systems however meant that other companies started producing more affordable electromechanical alternatives.
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Galvanized steel potable water supply and distribution pipes are commonly found with nominal pipe sizes from 3 ⁄ 8 inch (9.5 mm) to 2 inches (51 mm). It is rarely used today for new construction residential plumbing.
Turnstiles, swing gates and security doors are installed in the hall of office buildings, public and private administrations, industries, leisure and sports centers. Passenger access control. Automatic access control gates, ePassport gates and anti-reflow doors are mainly installed in Metro/Tram stations, [24] airports, railway, bus and ferry ...
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4. FEATURED IN THE MONTY HALL PROBLEM: CAR, DOOR, GOAT, HOST. How'd you do? Up Next: - 15 Fun Games Like Connections to Play Every Day. Related: Today’s NYT ‘Strands’ Hints, Spangram and ...
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