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Light collecting device capable of automatically tracking position of sun
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Louver
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Organ curtain
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Smart home gateway for sun-shading system
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Support machining method
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Compound type optical diffusion film
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Energy-saving melting furnace
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Multifunctional bar forming mold structure of fin mold
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Flow-deflection anaerobic reactor
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Water film dust collector
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Three-phase transformer
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Limiting device for electric shutter
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Lead screw limiter for electric shutter
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