What standards are used to classify low temperature cold storage, high temperature cold storage and medium temperature cold storage?

According to the design temperature of cold storage, it can be divided into low temperature cold storage, high temperature cold storage and medium temperature cold storage. The classification criteria are as follows:

High temperature cold storage (constant temperature storage): The design temperature of the cold storage is 5 ~ 15℃.

Medium temperature cold storage (cold storage): The design temperature of cold storage is (5 ~-5℃).

Low temperature cold storage (freezer): The design temperature of cold storage is-18 ~-25℃.

In addition to the above three kinds of cold storage, according to the design temperature of cold storage, it can be divided into ultra-low temperature storage and quick-freezing storage. The division criteria are as follows:

Ultra-low temperature cold storage (deep cold storage): The design temperature of cold storage is -45 ~-60℃.

Quick-frozen warehouse (quick-frozen warehouse): The design temperature of cold storage is -35 ~-40℃.

How about Qingyang Longshang Pearl Hotel? Is there any interesting place?

What's the difference between the margin for takeaway? Do I have to hand it in every day? Just hand it in once, right

Has Qingshan Delong registered its trademark? What other categories can be registered?

Is Mu Yuan Group a state-owned enterprise?

What does the hotel warehouse keeper have to beg for in his daily work?

Write an English composition with translation on the topic of job advertisement

Brief introduction of the paper

Are there many electric cars in Rizhao?

What is better for bathing in the bathroom in winter?

Shengzhou Xiaolong, named 1 in the world by the United States, is the best small county in China. Why is it not known?