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Multifunctional motor upstairs and downstairs going vehicle with portable use effect
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Vortex-type mutable cylinder methanol engine
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Pedaling type folding door
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Remote control parking space capable of allowing horizontal entering and exiting of car
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Impeller engine
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Impeller engine using regenerative propellant
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Watch type all-purpose card
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Energy-saving vacuum double cavity holding furnace
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Key chain with weight
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Energy-saving salt-core salt recovery equipment
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High-temperature-resistant gas valve
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High-temperature-resistant gas pump
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Manufacturing method of non-drop-sand mud core and spraying device
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Energy-saving metal mould with air-cooling device
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Energy-saving efficient salt core melting-casting furnace
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Method and device for producing gapless non-fracture precoated sand sprue cup
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Energy-saving lower metal die with heat radiating function
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Electric bicycle capable of flying
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Controllable crystal insulation cup with temperature display
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Opening machine for plastic bag
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