您好,移民局官方的要求是:An F-1 student may be authorized up to a total of 12 months of full-time practical training at each educational level (e.g., undergraduate, graduate and post-graduate). 并没有明确说明首次申请没有成功是否能够用同等学位再次申请。这种情况建议您致电移民局官方确认获取更准确的答案,移民局的联系电话是:800-375-5283。