求翻译：1对已完工程应进行保护，如门框、门栓要钉保护铁皮，防止磕碰；应用窄车运料以减少碰撞，车脚宜用胶皮、塑料或布包裹。是什么意思？

1 has finished works should be protected, such as door frames, door bolt to protect a metal nail, prevent bump; narrow car transportation to reduce collisions, feet should be wrapped with a rubber, plastic or cloth.