内转子、外夹套双重冷却，物料冷却效果好。
Double cooling of inner rotor and outer jacket ensures effect of mateerial cooling.
结构性能： 生物固体发酵罐由传动系统、外夹套、内筒体、加热、灭菌、冷却系统、喷淋装置等几部分组成。
Structure performance: biological solid fermenter is composed by driving system, outer jacket, inner cylinder, heating, sterilization, cooling system and spraying device, etc.
如在阀体外加上外冷却夹套，则可进一步降低对阀材料的要求。
If an external cooling jacket is used, the requirement on valve material can be further reduced.
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