EN 2874 : 1996 COR 1996现行
AEROSPACE SERIES - BOLTS, LARGE BIHEXAGONAL HEAD, CLOSE TOLERANCE NORMAL SHANK, MEDIUM LENGTH THREAD, IN HEAT RESISTING NICKEL BASE ALLOY, PASSIVATED - CLASSIFICATION: 1550 MPA (AT AMBIENT TEMPERATURE)/315 DEGREE C
出版：Comite Europeen de Normalisation
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