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專業生產銷售大口徑厚壁國標螺旋鋼管，廠內加工防腐/保溫/涂塑

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發泡直埋保溫管道價格

發泡直埋保溫管道價格

聚氨酯保溫直埋管在國外一些發已成為一項比較成熟的先進技術，近幾年供熱工程技術人員通過消化，吸收這項先進技術，正推動著國內管網敷設技術向更高的層次發展，幾年來的實踐成果...

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