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underdrain n.陰溝,暗渠,地下溝道。vt.用暗渠排去(…處)的水。...

underdraw

Standard specification for steel sheet , zinc and aramid fiber composite coated for corrugated steel sewer , culvert , and underdrain pipe 波紋鋼制下水溝暗渠和雨水管用鋅和芳族聚酰胺纖維復合涂覆鋼板的標準規范

Pvc standard specification for smooth - wall poly vinyl chloride plastic underdrain systems for highway , airport , and similar drainage 高速路,飛機場及類似區域排水用光壁聚氯乙烯

Pvc specification for smooth - wall poly vinyl chloride plastic underdrain systems for highway , airport , and similar drainage 高速公路機場和類似場所排水系統用光滑壁聚氯乙烯

Filter underdrain system 濾池配水系統

Standard specification for non - asbestos fiber - cement underdrain pipe 非石棉纖維水泥地下排水管的標準規范

Standard specification for asbestos - cement underdrain pipe 石棉水泥地下排水管的標準規范