watertight manhole 中文意思是什麼

watertight manhole 解釋
水密入孔水密人孔
  1. Specification for manhole cover assembly, raised, oiltight, and watertight

    可提升的防油防水的人孔蓋組件規范
  2. Specification for manhole cover assembly, bolted, semi - flush, oiltight and watertight

    半埋入式防油防水螺栓連接人孔蓋組件規范
  3. Standard specification for manhole cover assembly, bolted, raised, oiltight and watertight

    防油防水隆起的螺栓連接檢查孔蓋組件標準規范
  4. Specification for manhole cover assembly, bolted, hinged, semi - flush, oiltight and watertight

    半埋入式防油防水螺栓連接的人孔蓋組件規范
  5. Standard specification for manhole cover assembly bolted, semi - flush, oiltight and watertight

    防油防水半嵌入螺栓連接檢查孔蓋組件標準規范
  6. Standard specification for manhole cover assembly, bolted, semi - flush, oiltight and watertight, hinged

    防油防水半嵌入螺栓鉸接檢查孔蓋組件
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