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Ҏ(gu��)��mm	�ȱ��em2/m3	��϶��%	�ѷe�ض�kg/m3	�ѷe��(g��)��(sh��)n/m3
?25	460	84	145	64000
?38	325	87	125	25000
?50	236	90	105	11500
?76	150	92	90	3000