American Society for Testing and Materials, ASTM. Nke a na-akpọbu International Association for Testing Materials (IATM). American Society for Materials and TestingASTM) ugbu a bụ otu n'ime ụlọ ọrụ mmepe ụkpụrụ kachasị n'ụwa ma bụrụ ọgbakọ anaghị akwụ ụgwọ nọọrọ onwe ya. ASTM nwere ihe fọrọ nke nta ka ọ bụrụ ndị otu 34,000, ihe dị ka 4,000 n'ime ha si ọtụtụ narị mba na-abụghị United States. ASTM ewepụtala ụkpụrụ karịrị 10,000.

Ekele ekele ndịDonghuang DHDZ nkwụnye egona ịnataAsambodo ASTM

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