The cooling agent used in the cold is liquid nitrogen (the cooling temperature can reach -190 ~ 195 ° C), the liquid ammonia (the cooling temperature can reach -120 ° C), and the dried ice and alcohol (the cooling temperature […]
The cooling agent used in the cold is liquid nitrogen (the cooling temperature can reach -190 ~ 195 ° C), the liquid ammonia (the cooling temperature can reach -120 ° C), and the dried ice and alcohol (the cooling temperature […]