標題: ASTM A 978-1997重力流動衛生用排污管道暴雨排污管道專用... [打印本頁] 作者: 兌水 時間: 2009-9-10 19:17 標題: ASTM A 978-1997重力流動衛生用排污管道暴雨排污管道專用... A978/A978M-97(2002)e1 Standard Specification for Composite Ribbed Steel Pipe, Precoated and Polyethylene Lined for Gravity Flow Sanitary Sewers, Storm Sewers, and Other Special Applications