免费啪视频在线观看视频久

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螺旋聲測管

螺旋聲測管

螺旋式聲測管簡單聯接、聲測管無須現場焊接,采用螺旋式聯接,螺旋帶動雙扣,鎖緊密封膠圈,軸向端密封,有效防松動,防滲漏,便當快捷安全可靠,降低成本。安裝每個接頭用時不到1分鐘,節操操約了工時且無須任何技藝支撐。不需工地以外的預備義務、不需任何設備、簡練快捷(比傳統的方法快5倍)、隨便固定于鋼筋籠架、不受惡劣天色的影響。
免费啪视频在线观看视频久
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