標(biāo)題: ASTM D 4989-1990 使用平打板塑性計對瀝青屋頂層表觀粘度流... [打印本頁] 作者: 兌水 時間: 2009-10-14 10:35 標(biāo)題: ASTM D 4989-1990 使用平打板塑性計對瀝青屋頂層表觀粘度流... D4989-90a(2004) Standard Test Method for the Apparent Viscosity (Flow) of Roofing Bitumens Using the Parallel Plate Plastometer