Time：
2017
-
06
-
09
Summary of Certification ContentThe predecessor of ASTM was the International Association for Testing Materials (IATM).In the 1880s, in order to resolve the opinions and disagreements between buyers and suppliers in the process of purchasing and selling industrial materials, some proposed the establishment of a technical committee system. The technical committee organized representatives from various aspects to participate in technical symposiums to discuss and resolve disputes related to materi...