An in service valve suffering from Dezincification has a white powdery substance or mineral stains on its exterior surface.

 
  • 應用中的閥門(mén)如果出現脫鋅現象,在產(chǎn)品表面就會(huì )出現粉狀物質(zhì)或礦物污點(diǎn)。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan