The heater unit is insulated with mineral wool and surrounded with a galvanized sheet metal protective casing.

 
  • 加熱器由礦物棉進(jìn)行絕熱,再加設一層鍍鋅的金屬護套。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan