Kaihoko me te kaiwhakarato o ngā Ngongo ASTM A249

ASTM A249 / A249M – 16a

Ko te tau tohu ASTM e tohu ana i tētahi putanga ahurei o tētahi paerewa ASTM.

A249 / A249M – 16a

A = ngā konganuku rino;

249 = tau raupapa kua tohaina

M = ngā waeine SI

16 = tau o te whakatinanatanga tuatahi (mēnā rānei he whakahounga, ko te tau o te whakahounga whakamutunga)

a = e tohu ana i te whakatikatika i muri mai i taua tau anō