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(PVC管)聚氯乙烯塑膠硬質管規格表 - hvac-net.org.tw
(PVC管)聚氯乙烯塑膠硬質管規格表 單位:公厘(mm) 標稱 管徑 mm
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(PVC管)聚氯乙烯塑膠硬質管規格表 單位:公厘(mm) 標稱 管徑 mm
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