he aha te ngongo Astm a269?

he kaihanga matou o te ngongo kowiri tira astm a249 coil ngongo, te paerewa he ASTM A 249 Coil ngongo, te ngongo he Paerewa ko ASTM A249.he kanapa te mata, he 4000m/Coil te roa, he ngohe te ngongo coil, ka taea te whakamahi mo te mara hinu, paipa paipa, Taputapu.