underlayment
美 [??nd?'le?m?nt]
英 [?nd?'le?m?nt] 
- n.墊層;墊料;襯料
- 網絡屋面墊層材料;屋面襯料;底基層
英漢解釋
例句
standard specification for underlayment felt containing inorganic fibers used in steep - slope roofing
陡坡屋面用含無機纖維的襯底氈的標準規范
standard specification for asphalt - saturated organic felt underlayment used in steep slope roofing
陡坡屋頂用飽和瀝青有機氈襯墊的標準規范
Asphalt-Saturated Organic Felt Shingle Underlayment Used in Roofing
屋頂用飽和瀝青有機油氈蓋板襯墊
The technology and application of self-adhesive underlayment and flashing on sloped roof
坡屋面用自粘墊層及自粘泛水膠帶技術和應用
Reinforcing the soft soil base with gravel underlayment
砂礫墊層加固軟土地基實踐