The selective exposure of tissues to extreme cold, often by applying a probe containing liquid nitrogen, to bring about the destruction or elimination of abnormal cells.
冷冻手术有选择地将组织暴露在极度寒冷中，通常用含有液化氮的冷冻探针，来。
This paper presents the structure, working principle of SWACO, the liquid level control system, and the analysis of system failure and the cause of abnormal operation.
介绍了SWACO卧式罐结构真空除气器的液面控制系统的结构、工作原理。
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