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logistics roller capable of adjusting rotation speed based on gear transmission principle
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A kind of in-vehicle air conditioner being humidified according to air velocity
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A kind of fish hook of reverse clamp principle protection fish mouth
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A kind of porcelain mouth cleaning machine of orientation isolation point puts equipment
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A kind of pulling exhaust air column bag
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A kind of hydronic solar water heater
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A kind of solar-energy water heater vacuum thermal-collecting tube assembly
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A kind of evacuated collector tube of solar water heater
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A kind of double mode solar-energy water heater vacuum heat collector
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A kind of sufficient gas heater of burning
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A kind of sufficient air heater of burning
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A kind of high-efficiency gas water heater
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A kind of flame generating means of gas heater
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