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Copyright by the British Standards Institution Mon Jul 24 13:21:31 2000 Copyright by the British Standards Institution Mon Jul 24 13:21:46 2000 ? Copyright by the British Standards Institution Mon Jul 24 13:21:47 2000 ? Copyright by the British Standards Institution Mon Jul 24 13:21:48 2000 ? Copyright by the British Standards Institution Mon Jul 24 13:21:49 2000 ? Copyright by the British Standards Institution Mon Jul 24 13:21:50 2000 ? Copyright by the British Standards Institution Mon Jul 24 13:21:51 2000 ? Copyright by the British Standards Institution Mon Jul 24 13:21:52 2000