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Sewer pipe with flow-limiting function
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Oil delivery pipe device provided with lifting platform
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Underground water pipeline with stair restriction block
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Underground water pipeline with built-in restricting conical chamfered blocks
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Pollution-discharge water pipe with mice-killing enclosure
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Oil conveying pipe with handle screen
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Clothes airing pole with magnets for attracting and fixing hangers
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Supporting roll capable of being sleeved and connected with small electric fan
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Supporting roll with lubricating oil guide groove
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Natural gas pipeline with warning pneumatic valve
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Sewer pipe for sludge stirring drying treatment
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Gas-leakage prompt type natural gas pipe
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Water pipe wrapped with high-density plastic layer
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