防护罩；防护层；防护涂层；覆盖剂；

1. 保护被覆：262 螺桨警示灯 propeller warning signal light | 263 保护被覆 protective covering | 264 原型 prototype

2. 保护复盖：protective concrete layer 保护混凝土层 | protective covering 保护复盖 | protective cowl 保护性罩

3. protective covering

3. 保护层：protective coating 保护镀层 | protective covering 保护层 | protective layer 保护层

4. 护面：protective coverall 防护连衣裤 | protective covering 护面 | protective design 防护设计

1. the tough natural covering of some organisms

2. a covering that is intend to protect from damage or injury

    e.g. they had no protection from the fallout
           wax provided protection for the floors

    Synonym: protective coverprotection