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| 复合钢管 (【技】外壁或内外壁复合不同材料的碳素钢管。通过轧制复合、挤压复合、浇注复合、或固相复合等工艺而制成。管子外壁可以采用不锈钢、铜、镍、钛等材料而制成双金属管，内壁可采用有机材料制成钢塑复合管。) | |||
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