Chai, J. F.J. F.ChaiWu, Tsang-TsongTsang-TsongWuChuang, T. H.T. H.Chuang2010-10-202018-06-292010-10-202018-06-291993-01http://ntur.lib.ntu.edu.tw//handle/246246/217824en-USUltrasonic Measurement of Porosity in Ceramic Materials:a Preliminary Study