標題: ASTM A 998-1998下水道及相關用途的工廠加工的波紋鋼管... [打印本頁] 作者: 兌水 時間: 2009-9-10 19:48 標題: ASTM A 998-1998下水道及相關用途的工廠加工的波紋鋼管... A998/A998M-98 Standard Practice for Structural Design of Reinforcements for Fittings in Factory-Made Corrugated Steel Pipe for Sewers and Other Applications