Ô¼ÓÐ 0 Ïî·ûºÏ ���ұ�׼Һѹ������O�����ܷ�Ȧ���۳ߴ�GBT3452.3 µÄ²éѯ½á¹û£¬ÒÔÏÂÊǵÚ1-20 Ïî £¨ËÑË÷ÓÃʱ 0.068 Ã룩 ÍøÒ³£º
±§Ç¸£¬ÔÚ×ÊÁÏÖÐûÓÐÕÒµ½·ûºÏ���ұ�׼Һѹ������O�����ܷ�Ȧ���۳ߴ�GBT3452.3µÄ²éѯ½á¹û. ÇëÖØÐÂËÑË÷¡£