protective gap保护放电器,保险隙
protectiveadj.保护的;防卫的
protective lead glasses[医] 防护铅玻璃
protective head-cover防护面罩
protective metal armour防护用盔甲
Protective breast plate防护性胸前护垫
protective interlocking保护联锁装置
protective tariff policy保护关税政策
protective strip coating可剥性保护涂料
protective rubber gloves防护橡皮手套
Protective forest system防护林体系
protective enzyme system保护酶系统