
Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use as a Mineral Admixture in Concrete
出版:American Society for Testing and Materials

專家解讀視頻
Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use as a Mineral Admixture in Concrete
出版:American Society for Testing and Materials
專家解讀視頻