冷冻切片是一种最省时最快速的制片方法，常用于临床手术摘出物的病理诊断。因此冷冻切片机成为各医院病理科的必备设备之一。由于冷冻切片要求的温度较低，一般厂家都采用两级冷冻机组达到温度要求。英国SHANDONAS620E冷冻切片机同样采用两级制冷系统，但它第一级用压缩机制冷 Cryosectioning is one of the most time-saving and fastest-producing methods and is commonly used for the pathological diagnosis of clinical surgical explants. Therefore, cryo-microtome has become one of the necessary equipment for pathology in hospitals. Due to the lower temperature required for cryosectioning, manufacturers generally use two-stage refrigeration units to meet temperature requirements. The British SHANDONAS620E cryo-microtome also uses a two-stage refrigeration system, but its first stage is cooled by a compressor.