protection net防御网protectionn.保护；防卫protection based on microprocessor微机保护protection of intellectual poverty知识产权保护protection multiprogramming memory多道程序存储保护Protection against double jeopardy禁止双重危险protection of disadvantaged groups弱势群体保护protection of personal information个人信息保护protection method of soil-hungry防止土壤瘠薄措施protection and indemnity insurance保赔保险,保障与赔偿保险Protection and management measures防护措施protection system of stray crurent杂散电流防护系统