protective coal seam

 
  • 保護層

protective coal seam的用法和樣例:

例句

  1. The glass window had a protective overcoat applied to it.
    玻璃窗塗有一層保護層。
  2. All buried lines are coated with a protective covering to save them from corrosion.
    所有埋設的管道必須塗上保護層,以防生鏽腐蝕。

protective coal seam的相關資料:

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