protective mat保护软垫protectiveadj.保护的；防卫的protective substrate保护基板protective restraint保护性约束protective mechanism保护性机制protective isolation隔离式防护protective electrode保护电极protective screening防护网protective care unit保护性监护室protective shielding防护屏protective potential自卫能,自卫能力,保护电位protective detention保护性拘留