I-American Society yokuhlola nezinto zokwakha, i-ASTM. Phambilini kwaziwa ngokuthi inhlangano yamazwe omhlaba ngezinto zokuhlola (IATM). Umphakathi waseMelika wezinto zokwakha nokuhlolwa (Isosha) Njengamanje ngenye yezinhlangano ezinkulu kakhulu zokuthuthukisa amazinga emhlabeni futhi yinhlangano ezimele engenzi nzuzo. I-ASTM inamalungu acishe abe ngu-34 000, cishe ama-4,000 awo avela kumakhulu amazwe angaphandle kwe-United States. I-ASTM ithuthukise amazinga angaphezu kuka-10,000.

Ukuhalalisela ngokufudumele kuDongghuang U-DHDZ UthethelelaEkutholeniIsitifiketi se-ASTM

Isosha, amandla omoya we-Donghuang, ochwepheshe ekukhiqizweni nasekuthengisweni kokucaciswa okuhlukahlukene kweuhlobo, ukuthethelelwa, imininingwane ephelele, ingenziwa ngokwezifiso ngokuya ngezidingo zamakhasimende, wamukela amakhasimende amasha nabadala ukubonisana, ikhwalithi yedumela ...

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