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 Ọnụ ego DHZna ịnataAsambodo ASTM

Astm, Donghuang ifufe ike, ọkachamara na mmepụta na ahịa nke dị iche iche nkọwa nkeflanges, forgings, nkọwa zuru ezu, nwere ike ahaziri dị ka ndị ahịa chọrọ, nabata ndụmọdụ ndị ahịa ọhụrụ na ochie, àgwà aha ọma ...

ụdị: ShanxiFlange ike ikuku DonghuangỤlọ ọrụ Manufacturing Co., Ltd