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Display lifting device and display thereof
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A kind of new negative characteristic pulling force scrollwork extension spring
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Negative characteristic tensile force vortex roll tension spring
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A kind of outer rail is the ball slide rail of cladding shell type
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A kind of display lowering or hoisting gear
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Double-arc shaped displayer bracket
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Circulating ball linear bearing type lowering or hoisting gear
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Slender upright post type lifting support frame with coaster
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Roller plate-like slide part elevating mechanism
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Blade thin type support meanss
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Roll the support meanss of lifting
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