Cross References: BS M 54 BS EN 2002-1 BS EN 2002-2 BS EN 2002-005 BS EN ISO 6506-1 BS EN ISO 6507-1 BS EN ISO 6508-1 BS EN ISO 7438 BS EN ISO 8492 BS EN ISO 8493 BS ISO 7800 EN 2950 EN 4050-2 EN 4050-4 AS 5491 ASTM E112
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