Tekanyetso ea ASTM ea ho lekanya Litaelo tsa Tšebeliso ea Lisele
Fumana Maemo a pharalletseng a ho Lekanya Tšebeliso ea Lisele bukeng e fanoeng ea mosebelisi. Fumana litaelo le litataiso tse felletseng tsa ho sebelisa liprothokholo tsa ASTM ho lekola ts'ebetso ea lisele ka nepo.