Food manufacturing arose during the industrial revolution in the 19th century. This development took advantage of new mass markets and emerging new technology, such as milling，preservaton，Packaging and labeling and transportation. It brought the advantages of pre-prepared time saving food to the bulk of ordinary People who did not employ domestic servants.

最后一句saving现在分词做后置定语修饰pre -prepared time？或者 saving food整个修饰pre -prepared time？翻译：节省食品前期准备时间？