So far no one has developed as a result of the preservation of its technology, hence the "red purple toot toot, do not buy Department store" is.

由于至今还没有人研究出对它的保鲜的技术，所以出现了“红嘟嘟紫嘟嘟，南货店里没买处”的说法。

youdao

The structure design of ice-temperature preservation cold store for fruits and vegetables was introduced and its air supply mode was compared with the traditional mode.

阐述了果蔬冰温保鲜冷库的结构设计，并与传统的冷库送风方式进行了比较；介绍了冷库的制冷系统设计、气调设备配置等设计要点。

youdao