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快速報價系列RTA步進電機驅動器MIND B5貨期好
快速報價系列RTA步進電機驅動器MIND B5貨期好
絲扣密封不得使用鉛汕麻絲。用厭氧密封膠密封的管接頭，養護期不得少于24H，期間不得進行試壓在熱水供應管道系統中，應采用內襯交聯聚乙烯（pex）的鋼塑復合管和內襯聚丙烯（PP）的管件.當采用橡膠密封時，應采用耐熱橡膠密封閣.冷水管所用管材配件不得用于熱水管進系統中。埋地鋼塑復合管道應有可靠的防腐措施。在水池（箱)沒水部分的管道應釆用內外涂槊鋼管及管件.泄水管、出水管應采用內外及管口端涂塑管段。

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產品質量認證是認證檢驗機構依據標準和相應的技術要求對產品質量進行檢驗、評定。經檢驗合格的產品向產品所有人（送檢人）出具認證報告或頒發證書。產品在上市銷售前，質量認證是必須的。而產品能否持續穩定運轉、耗能多少，還與產品設計、材料、元件特別是電機有關。效果：空氣凈化器的凈化效果，是以單位面積潔凈空氣率表示（記住：一定是單位面積）。權威檢測機構美電制造商協會（簡稱：AHAM），對凈化效果的檢測，項目為灰塵、花粉、二手煙。