Piawaian ASTM Amerika (Gred biasa) ASTM-a228 ASTM-a229 ASTM-A401A401 ASTM-A877-A877M-10 Standard EN Eropah EN_10270_1 EN-10270-2 EN_10270_3 Standard GB Cina GBT 18983-2017 dawai spring terbaja minyak
