Standard:JIS, DIN, ASTM, GB, bs, API, JIS G3474-2008, JIS G3459, JIS G3441, DIN EN 10025, ASTM A513-2007, ASTM A199, ASTM A523-1996, Gb/t816
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JIS, DIN, ASTM, GB, bs, API, JIS G3474-2008, JIS G3459, JIS G3441, DIN EN 10025, ASTM A513-2007, ASTM A199, ASTM A523-1996, Gb/t8163, GB/T3639, GB/T5310, BS 3059-2, BS EN 10297, BS EN10296, API 5L