The effect of using donor cells of different cell cycle, cell type, chemical activation, as well as refrigeration, on cloning animal has been summarized.

供体细胞的细胞周期、细胞类型、冷冻处理和化学激活等方面都可能影响动物克隆的效率。

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According to the principle of overcooled refrigeration cycle, a new type residential ice storage air - conditioning system was designed and its operating process was introduced.

基于大过冷度制冷循环的原理，提出了一种新颖的家用冰蓄冷中央空调系统，并对此系统的工作过程进行了详细介绍和分析。

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HD series water-cooled type cold and dry machine is the use of water as a carrier for cooling refrigerant, thus completing the entire refrigeration cycle.

天源系列水冷型冷干机是利用水作为载体来冷却制冷压缩机的冷媒，从而完成整个制冷循环。

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