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Some problems about buried plastics pipe are analysed in the paper.
解析有关塑料埋地排水管的一些疑问。
youdao
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It is a kind of plastics pipe of energy saving and environmental protection.
是一种节能、环保型的塑料管材。
youdao
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It is a kind of plastics pipe of energy saving and environmental protection.
是一种节能、环保型的塑料管材。
youdao