This paps introduces the advantages and disadvantages of P/A/P pipe and compares with varions water supply pipe in the building with polyethylene pipe materical.

 
  • 本文介紹了鋁塑復合管的優(yōu)缺點(diǎn),及其與各種建筑給水用塑料管材的性能比較。
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国内精品美女A∨在线播放xuan