What are the temperature zone classifications of cryogenic refrigerator?

Low-temperature refrigerator, also known as low-temperature freezer, in accordance with the temperature zone can be divided into: 4 ℃ blood box, 2 ~ 8 ℃ medical refrigerator, -25 ℃ low-temperature refrigerator, -40 ℃ low-temperature refrigerator, -60 ℃ low-temperature refrigerator, -86 ℃ low-temperature refrigerator, -105 ℃ low-temperature refrigerator, 135 ℃ low-temperature refrigerator, -152 ℃ low-temperature refrigerator, -164 ℃ low-temperature refrigerator. Most of the industry's lowest temperature of the cryogenic refrigerator is -150 ℃ or so, in which the national brand Zhongke Meiling (Meiling Biomedical) cryogenic refrigerator can reach -164 ℃!