American Society yeKuedza uye Zvishandiso, ASTM. Aimbozivikanwa seInternational Association for Testing Materials (IATM). IAmerican Society yeZvishandiso uye Kuedza (ASTM) parizvino nderimwe remasangano makuru ekusimudzira zviyero pasi rose uye isangano rakazvimirira risingabatsiri. ASTM ine nhengo dzinosvika zviuru makumi matatu neina, dzinenge zviuru zvina kubva kumazana enyika dziri kunze kweUnited States. ASTM yakagadzira zvinopfuura zviuru gumi zviyero.

Warm makorokoto kuneDonghuang Mifananidzo ye DHZpakugamuchiraASTM Chitupa

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